ORNL-1702.txt

 

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A SUMMARY OF DENSITY MEASUREMENTS ON
MOLTEN FLUORIDE MIXTURES AND A

 

CORRELATION FOR PREDICTING DENSITIES

71

OF FLUORIDE MIXTURES

S. |. Cohen
T. N. Jones

-‘—

Crasgivication Cuanaen To
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- oRag.-1702

This document consists of 38 pages
Copy y'of 222 copies  Series A

Contract No W-T405-eng-26

Reactor Experimental Engineeraing Division

A SUMMARY OF DENSITY MEASUREMENTS ON MOLTEN FLUORIDE MIXTURES
AND A CORREIATION FOR PREDICTING DENSITIES
OF FLUCRIDE MIXTURES

S I Cohen
T N Jones

DATE ISSUED

JUL 19 1954

OAK RIDGE NATIONAL LABORATORY
Operated by
CARBIDE AND CARBON CHEMICALS COMPANY
A Divaision of Union Carbide and Carbon Corporation
Post Office Box P
Oak Ridge, Tennessee

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TABIE OF CONTENTS

PAGE
SUMMARY 5
INTRODUCTION 6
DESCRIPTION OF EXPERIMENTAL PROCEDURE 8
A Dascussion of Method 8
B  Description of Equipment 10
EXPTANATION OF THE CORRELATION 15
REFERENCES 26
APPENDIX 27
TABIE 1 Experimental Density-Temperature Data 28
TABLE 2 Constants Used in Calculating Room
Temperature Densities 29
TABLE 3 Calculation of Room Temperature Densities 30
TABLE 4 Comparison of Predicted and Experimental
Density-Temperature Data 37
SUMMARY

This report contains a summary of all the experimental density measure-
ments on molten fluoride mixtures that have been developed for the Aircraft
Nuclear Propulsion Project A correlation of these data 1s presented whaich
can be used to predict liquid densities of fluoride mixtures of known compo-~
sition over wide, elevated temperature ranges

Experimental measurements were made by the buoyancy principle using
a plummet suspended in the molten salts from an analytical balance, the
entire system being enclosed in a dry-box

All the information avallable on compositions, experimental densities,
melting points and cubical coefficients of expansion may be found in this
report, calculated values of liquid and room temperature densities, mo-
lecular weights and molecular volumes of all the mixtures that have been

developed fqor the ANP program are also presented

 
IRTRODUCTION

Since the outset of the Aircraft Nuclear Propulsion project, interest has
been centered on molten fluoride mixtures as the best potential circulating
fluids for use i1n high temperature reactors of the ARE type Durang the course
of the project, some fifty or more mixtures of fluorides have been suggested
and a number of these aroused sufficient interest to merit measurements off
their physical properties

In the early stages of the density research program the experimental
accuracy was somewhat lower than in the later stages During the former
Period some questions concerning purity of both the molten salts and the
blanketing atmosphere arose Also, the techniques of temperature measurement
and control, and weighing facilities were refined during the latter period
As a result, the more recent determinations afford a somewhat higher degree
of accuracy than the earlier ones

The correlation descraibed in this report i1s based on measurements on
all the mixtures that have been studied In a few instances, notably compo-
sition No 12 (Flinak), 1t has been possible to make a second set of measure-
ments on a mixture for which the properties had been measured very early in
the project, and i1n these instances the data listed below are the revised

values In past reports on several of the compositions, a correction based

 
. - T- o9

on the volume change of the plummet with temperature was omitted, the error
introduced being well within the accuracy claimed for the data  However, this
correction has been applied where necessary in this report and i1t 1s suggested
that i1n subsequent studies involving the densities of fluorides, the data

in this report be used

B 4
DESCRIPTION OF EXPERIMENTAL PROCEDURE

A Discussion of Methed

wme

Density values reported here were determined by the buoyancy principle

involving & plummet suspended in a liquid The density of the liquid, P,

18 defined by

WL,
p:-—_
VL
where,
Wy, weight of liquid displaced by the plummet
Vi, Volume of liquid displaced by the plummet
and WL=WA-WL
Where,

Wy, weight of plummet in air

W1, weight of plummet in liquad

Upon substituting (2) in (1), there results

_ Wy - W
v

p

 

(1)

(2)

(3)

3 ud
. - 9 -

The volume of liquid displaced by the plummet, vy, 1s also equal to the
volume of the plummet and may be determined by weighing the plummet in a
liquid of known demsity (water was used) At room temperature the volume of
the plummet 1s

Wa - Wgs0
VI, = —_— (L)
pHgO

where,

WHQO’ weight of the plummet in Ho0 at
room temperature

PHS0» densaity of water at room temperature

The volume of the plummet at elevated temperatures is

Wy - W0
V], = VLO [l + BP (T-To)] = -—BE-(-)-e——

F+%(m%fl (5)
2

where,
T, liquid temperature

To, room temperature
BP, cubical expansion coefficient of

the plummet

Upon substituting equation (5) into equation (%), one obtains

(WA = WL) PHo0 (6)
P = (W, - Wgo0) [1 + By (T-To)]

 
o
i

Was WHQO and the temperature of water were measured before the experiment was
started Values for pHgO and Bp are known, values of WL at the various tempera-
tures were measured

Experimental density data are represented in this report by the equation

o =a - bl (7)
Values of the cubical coefficients of expansion were calculated from the

defining equation

=t

pr = - (%%)P (8)

©

The experimental data are given i1n Table 1 and in Figure 3 where the
temperature range over which measurements were made on each mixture is shown
The experimental data are also tabulated in Teble 4 in the form of equation (7)
A simple analysis indicates that these data are probably not in error by more
than + 5% Experimental values for the coefficients of cubical expansion of

the various liquids may be found in Table 1

B Description of the Equipment
The system (see Figure 1) used for taking these measurements consisted

principally of a stainless steel plummet suspended in the molten salts by a

 
-11-

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Fig { Schematic Diagram of Density Measurement System
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Fig. 2. Photograph of Dry Box Containing Density Measurement System.

 
[ -13 - o

fine steel wire from a Voland 'Speedigram" balance (a chainomatic balance on
which weights larger than 100 mg are controlled mechanically by knobs with no
loss 1in accuracy) The plummets were fabricated from 1/4" No 316 stainless
steel rod The containers for the molten salts were fabricated from 1 1/2'

I P S, Schedule 40, No 316 stainless steel pipe The tube furnace was
mounted on a small rolling platform equipped with ball-bearing casters to
facilitate centering of the tube under the balance as well as under the two
systems for determining viscosities which were also housed in the dry-box
(Both density and viscosity measurements were made during the same heat-up
period Viscosity studies will be discussed in a separate report)

The temperature of the melt was measured with the aid of two chromel-
alumel thermocouples and a Brown multipoint recorder, the couples were inserted
in wells made of 1/8’ stainless tubing and supported in the liquid salt so
that one couple was 2-3 inches below the surface and the other 5-6 inches
below the surface The wire supporting the plummet was of such length that
the plummet was suspended at a depth between the two couples Temperature
of the furnace was controlled by a combination of a variac and a
Simplitrol with a chromel-alumel thermocouple The hot Jjunction of thais
couple was 1mbedded 1n the outside surface of a thick-walled copper pipe used
as a thermal diffuser between the heating surfaces of the tube furnace and
the tube containing the melt Since this hot junction "sees' the heating
element face, a very semnsitive temperature control was afforded As the

experiment progressed, the temperature setting was increased by a small

© Yy
— -

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2N

increment and in a short time the temperatures indicated by the two immersed
thermocouples rose to a point slightly below that set on the Simplitrol,
leveled off and approached each other, at this point the two readings were
usually no more than 5 degrees apart  After this practically isothermal con-
dition was reached, a weight reading and the average temperature were recorded
Since the fluorides in the molten state are very sensitive to the atmos-
phere, a number of precautions were taken to insure 1ts purity Argon was
circulated through the dry-box and out of & bubbler at a measured rate until
the calculated concentration of argon was above 99 9% These calrulations
have been checked experimentally by measuring the oxygen concentration of the
gas 1n the dry-box with a Burrell Gas Analyzer Effort was made to remove
the final traces of oxygen and water, these being the chief undesirable
impurities, by placing indicating Drierite from a closed container into a
flat open dish to get the water and by starting up an oxygen removal device
consisting of a tube furnace containing a cartridge of copper filings and
equipped with a 15 CFM blower The filings were brought to red heat and the
atmosphere in the dry-box circulated over them  Purity offithe atmosphere,
which determines the purity of the melt, 1s indicated by the appearance of
the plummet when 1t 1s withdrawn from the melt  The plummet, though dis-
colored, will have a clean smooth surface when taken from a clean melt No
difficulty was encountered with condensation on the wire except during measure-
ments on mixtures containing ZrF)  When working with these salts, the plummet
was removed between weighings and the tube containing the melt was covered

to retard the zirconium snow effect

L e
s -15 - i i

EXPLANATION OF THE CORRELATION

Although more than fifty different fluoride mixtures have been developed
since the initiation of the ANP program, density measurements have heen made
on only fifteen of these mixtures 1In addition, new mixtures are developed
as the program continues For these reasons i1t was felt that a method for
predicting densities of molten fluorides would be useful and the correlation
described below was developed

The correlation 1s based on plots of the experimentally determined liquid
densities at any one temperature against the calculated densaities of the corre-
sponding mixture at room temperature These room temperature densities are

calculated by the formula

o = =l (9)

where,

p, density at room temperature of the mixture
(gm/cc)

My, molecular welghtl of a component of the
mxture (gm/mol )

f,, mol fraction of that component

p,, density at room temperaturel of that component
(em/ce)

 

lThe values used for the various components are listed in Table 2
of the appendix

3 4 9§ Sy
- 36 - b

The numerator 1s the calculated molecular weight of the mixture and the
denominstor 1s the calculated molecular volume of the mixture Values of

the room temperature density calculated from this formuls were checked against
experimentally determined values for a series of 10 fluoride mixtures and
were found to differ by no more than + 5 percent (Reference 1)

Figure 3 gives the density-temperature data for all of the liquid fluoride
mixtures that have been studied to date (References 2, 3, 4, 5, 6, 7, 8, 9,
10, 11, 12) The figures in parentheses are the calculated room temperature
densities The data given in Table 1 were used in drawing these curves It
1s noted that the average liquid densaities are proportional to the calculated
room temperature densities of the corresponding mixtures

Figures 4a, 4b, Yc and 4d represent plots of liquid densities against
the calculated room temperature densities of corresponding mixtures at 600°C,
700°C, 800°C and 900°C respectively, these 1sotherms were cross-plotted from
Figure 3 Figure 5 1s a composite of figures lYa, Wb, 4ec and kd  Knowing
only the calculated room temperature density, the liquid density may be pre-
dicted for any mixture of fluorides over this temperature range

Figures 6 and 7 were derived from Figure 5 and give the constants, a and
b, for equation 7, as a function of the room temperature density

The density correlation presented here satisfactorily represents all the
experimental measurements on the fluoride mixtures, the mean deviation is

gbout % and the maximum deviation 1s 6% Table 3 gives the calculated room

A
iy
LIQUID DENSITY (g/cc)

ORNL—-LR-DWG 578

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6 0
50
T MIXTURE 43 (517)
\
\
T\
L MIXTURE 33 (4 93)
40 =
\QN-MIXTURE 46 (4 86)
MIXTURE 44 (4 19)] MIXTURE 2¢ (4 53)—7 ————==-MIXTURE 2 (4 66)
MIXTURE 40 (4 09)-
‘o MIXTURE 19 (3? e MIXTURES 25 AND 31 (3 97) AND (3 96)
——
MIXTURE 21 (3 76) > ————MIXTURE 250 (3 92)
MIXTURE 12 (2 45)—r——===x
20 “-'='-='—--_< P==———-=—M|XTURE 100
MIXTURE 14 (2 59) (253)
10
0
300 400 500 600 700 800 900 1000

Fig 3 Densities of Fluoride Mixtures (g/cc) vs Temperature (°C)(Numbers in Parentheses are Calculated Room

Temperature Densities)

TEMPERATURE (°C)

1100

-Ll—
LIQUID DENSITY (q/cc)

-18-

S
ORNL-LR—-DWG 579

 

1o 20 30 40 50 60 70
CALCULATED ROOM TEMPERATURE DENSITY (g/cc)

!
Fig 4a Liquid Density at 600°C vs Calculated Room Temperature Density
LIQUID DENSITY (g/cc)

4

4

-19=

ORNL—LR—-DWG 580

 

10 20 30 40 50 60
CALCULATED ROOM TEMPERATURE DENSITY (g/cc)

Fig 4b Liquid Density at 700° C vs Calculated Room Temperature Density

70
LIQUID DENSITY (g/cc)

 

«20-

.
ORNL-LR-DWG 584

10 20 30 40 50 60 70
CALCULATED ROOM TEMPERATURE DENSITY (g/cc)

Fig 4¢ Liquid Density at 800° C vs Calculated Room Temperature Density

 
LIQUID DENSITY (g/cc)

10

Rk o

 

-21-

L
ORNL~-LR—~DWG 582

10 20 30 40 50 60 70
CALCULATED ROOM TEMPERATURE DENSITY (g/cc)

Fig 4d Ligqud Density at 900° C vs Calculated Room Temperature Density
F B am—
ORNL-LR-DWG 583

LIQUID DENSITY (g/cc)

 

0 {0 20 30 40 50 60 70
CALCULATED ROOM TEMPERATURE DENSITY (g/cc)

Fig 5 Liquid Density vs Calculated Room Temperature Density (Composite of Figures 2a 2b 2¢ 2d)
INTERCEPT OF DENSITY- TEMPERATURE CURVE a

10

 

-23-

ORNL—-LR-DWG 584

B3t

0 10 20 30 40 50 60 70

CALCULATED ROOM TEMPERATURE DENSITY (g/cc)

Fig 6 Intercept of Density- Temperature Curve ( a ) vs Calculated Room Temperature Density
0 010

b
ro

0 00Of

SLOPE OF DENSITY-TEMPERATURE CURVE

0 o001

 

2. s —24-

ORNL-LR-DWG 585

0 10 20 30 40 50 60 70

CALCULATED ROOM TEMPERATURE DENSITY (g/cc)

Fig 7 Slope of Density— Temperature Curve( b )vs Calculated Room Temperature Density

 
el

_— % -

temperature densities, as well as compositions, molecular weights and
molecular volumes, for all the fluoride mixtures that have been formulated
1n the ANP program (References 13 and 14) and Table 4 lists the predicted
densities in terms of equation 7 for all of these mixtures as well as the
experimentally determined formulae to 1llustrate the agreement

Cubical coefficients of expansion at 700°C of the liquids calculated
from this correlation are inversely proportional to density and vary from
3 60 x IO'A (1/°C) for s mixture having a room temperature density of

2 0 (gm/cc) to 2 37 x 107H (1/°C) for a mixture having a room temperature

density of 5 5 (gm/cc)

%
B2
£ W

W o =1 O W

10

11l

13
14
15

16

- 26 -

REFERENCES

Melvin Tobias, S I Kaplan, S J Claiborne, ORNL CF 52-3-230

S I Keplan, ORNL CF 51-8-97

J Cisar, ORNL CF 51-11-78

J

J

S

Cisar, ORNL CF 51-11-198

Cisar, Personal communication

F

I

I

I

I

Redmond, T N Jones, ORNL CF 52-11-105

Cohen,
Cohen,
Cohen,

Cohen,

S I Cohen,

ANP Physical

T

T

T

T

T

N
N
N
N

N

Jones, ORNL CF 535-7-125
Jones, ORNL CF 53-10-86
Jones, ORNL CF 53-8-217
Jones, ORNL CF 53%-12-179

Jones, Memo to be 1issued

Properties Group, ORNL CF 53-3-261

C J Barton, ORNL CF 53-10-78

C J Barton, Personal commmications

Katz and Rabinowitch, "The Chemistry of Uranium,"

NNES VIII-5, p 366

Henglean, F A , Z Elektrochem , Vol 30, p 5, 1924

‘g‘)
TABIE 1

TABIE 2

TABLE 3

TABIE L

APPENDIX

Experimental Density-Temperature Data

Constants used in Calculating Room Temperature
Densities

Calculation of Room Temperature Densities

Comparison of Predicted and Experimental Density-
Temperature Data
TABIE 1

EXPERIMENTAL DENSITY-TEMPERATURE DATA

 

 

 

Cubical
Coefficient
LIQUID DENSITY (gm/cc) of Expa.nstonz
Composition 600°C T00°  800°  900°C 1/9¢ x 10 Reference
2 4 00 3 89 3 78 3 67 2 96 2,12
2a 3 88 5 T7 3 66 5 55 2 92 5,12
12 2 10 2 02 194 1 88 3 61 11
14 2 11 2 02 1l 93 b 46 4,12
19 3 13 3 48(600°¢c) 5,12
21 2 96 2 80 5 51(800°C) 5,12
25 3 23 3 1k 5 05 2 96 2 90 5,12
258 3 17 5 09 5 0l 2 95 2 59 5,12
31 3 23 3 14 3 05 2 96 2 96 6,12
33 3 98 3 99 6,12
40 3 27 3 21 3 16 171 7
L3 4 60 b L7 I 3h 2 83 8
L 3 38 5> 27 3 16 3 36 9
L6 5 9l 579 3 67 5 07 10
100 2 03 1 97 192 2 71 11

2‘Ven.lue is for TOOOC unless otherwise noted  The calculated range of
cubical expansion coefficients 1s from 3 6 x 10-%* 1/°C to
2 4 x 10°% 1/0C The few experimental values which fall outside of
this range probably do so because they are based on early or incomplete
sets of data
- 29 -

TABLE 2

CONSTANTS USED IN CAICULATING ROOM
TEMPERATURE DENSITIES

 

Molecular Room Molecular

Component Weight, Temperature Volume,
M Density, Mi/p,

(gn/mo1) o (cc/mol)

(gm7CC)

IaF 25 9 2 30 11 26
NaF 42 2 79 15 05
BeFo W7 1 98 23 T4
KF 58 1 2 48 23 43
ZrF), 167 2 L 43 37 Th
UF), 310 1 6 703u 46 88
RbF 104 5 3 557 29 38
PbFo 2hs 2 8 24 29 75
ThF), 308 1 6 702 45 99
UF3 295 1 8 956 32 97

3Reference 15

hReference 16

OValue for UF, Value for ThF), not available
GDerlved from X-ray data

All other values taken from Lange's Handbook
of Chemistry, Eighth Edation
 

a -0 - C
TABLE 3
CAICUIATION OF ROOM TEMPERATURE
DENSITIES OF FLUORIDE MIXTURES
N M,, molecular wt of
M, £, component
Mol Wt of Mixture _ i=1 £;, mol % of that
PRoom Temp = Mol Vol of Mixture = N vhere, "1’ compfnent
(Ml/pi)fl

pi, demsity at room
1=1 temperature of
that component

 

 

Mol Wt Mol Vol
of of
Mixture Component  f, Mf,  Mxture (M;/p1)f3  Mixture PRoom Temp

1 BeFo 12 5 6 75 2 2 85 19 92 3 17
NaF 76 319 11 44
UF), 12 37 7 5 63

2 NaF W6 5 19 5 121 O 7 00 25 98 L 66
KF 26 0 15 1 6 09
UFy, 27 5 86 &4 12 89

Pa NaF L8 2 20 2 114 3 7 25 25 25 4 53
KF 26 8 15 6 6 28
UF)y 25 0 78 5 11 72

3 BeFp 60 0 28 2 85 8 14 24 25 03 3 43
NaF 25 0 10 5 3 76
UF), 15 0 47 1 7 03

L NaF 35 1 7 167 6 5 27 31 06 5 4O
KF 20 11 6 4 69
UF), 45 141 3 21 10

5 NaF 60 25 2 135 O 9 03 23 84 5 66
PbF2 23 56 4 6 84
UF), 17 53 L T 97

6 NaF 30 12 6 46 1 L 52 21 12 2 18
BeF2 65 30 6 15 43
KF 5 29 117
. - 31 - ¥

TABIE 3 (Con't )

CALCULATION OF ROOM TEMPERATURE
DENSITIES OF FIUCRIDE MIXTURES

 

 

Mol Wt Mol Vol
of of
Mixture Component fi Mify Mixture (M,/p,)fj;  Mixture PRoom Temp
7 NaF 50 21 126 8 T 53 26 28 L 83
KF 20 11 6 b 69
UF}, 30 gl 2 1k 06
8 NeF 100 L2 2 797
9 BeFo 100 W7 1 987
10 [T 100 25 9 2 307
11 KF 100 58 1 > 4,87
12 NaF 11 5 L 8 b1 2 173 16 81 2 45
(Flinsk) KF 42 0 2l L 9 84
I1F 46 5 12 0 5 o
13 NaF 53 20 3 128 7 98 25 52 5 02
RbF 20 20 9 5 88
UFY 27 84 8 12 66
1k KF 43 5 25 3 bk 9 10 19 17 36 2 59
(Flinak) LiF Ly 5 11 5 5 01
NaF 10 9 L 6 1 64
UF), 11 3 5 52
15 NaF 29 5 12 4 50 3 b by 21 5% 2 3
BeFp 64 0 30 1 15 19
KF b9 28 115
UF), 16 50 75
16 NaF 34 0 1 3 68 0 5 12 22 76 2 99
BeFo 57 5 27 0 13 65
UF), 85 267 3 99

7Ta.ken from Lange's Handbook of Chemistry,

Eighth Edition
3 N
-32 -

TABIE 3 (Con't )

CAICUIATION OF ROOM TEMFERATURE
“DENSITIES OF FLUOCRIDE MIXTURES

fi“f

 

 

Mol Wt Mol Vol
of of
Mixture Component  fj M,fy  Mixture  (Mj/p3)fy Mixture PRoom Temp

17 NaF 47 0 19 7 50 O 7 07 20 12 2 49
BeFo 51 0 24 0 12 11
UF), 20 63 ol

18 NaF 45 O 18 9 96 5 6 T7 20 80 L 64
LiF 33 0 85 5 T2
UFY 22 0 69 1 10 31

19 NaF 5 0 21 108 2 75 29 49 3 67
KF 51 O 29 6 11 95
ZrF), 42 0 70 2 15 85
UF), 20 63 ol

20 NeF 50 21 104 2 75 29 16 3 57
KF 52 0 30 2 12 18
ZrFl 43 0 71 9 16 23

21 NaF L 8 20 112 1 72 29 83 3 76
KF 50 1 29 1 11 Th
ZIF), 513 691 15 59
UF), 38 11 9 1 78

22 KF 46 0 26 T 122 9 10 78 31 53 3 90
ZrF), 50 0 83 6 18 87
UF), 40 12 6 1 88

23 KF 41 8 o 3 42 9 9 79 16 99 2 53
NaF 11 4 L 8 172
1a1F 46 2 12 0 5 20
THF), 06 1 8 o8

2L KF 18 0 10 5 102 5 L 22 27 00 3 80
NaF 36 0 15 1 5 42
ZrF), 46 0 76 9 17 36
] - 33 - %

TABIE 3 (Con't )

CAICUIATION OF ROOM TEMPERATURE
DENSITIES OF FLUORIDE MIXTURES

 

 

Mol Wt Mol Vol
of of
Mixture Component  f, M,f, Mixture (My/p1)f;  Mixture PRoom Temp

25 KF 17 4 101 109 9 4 08 27 70 3 97
NaF 34 7 14 6 5 22
ZxF) Lk Th 2 16 76
UFy, 55 11 0 1 64

25a NaF 35 1 14 7 107 7 5 28 27 48 3 92
KF 17 6 10 2 L 12
ZrF), 4 8 T4 9 16 91
UFy 25 79 117

26 KF 14 © 81 111 6 3 28 27 78 L 02
NaF 36 6 15 4 5 51
vAJN 45 6 76 2 17 21
UF), 38 11 9 1 78

27 NaF 46 0 19 3 115 5 6 g2 27 67 Y 17
ZrF), 50 0 83 6 18 87
UFy, L 0 12 6 188

28 NaF 48 0 20 2 107 1 7 22 26 8h 3 Q9
ZYF), 52 0 86 9 19 62

29 NaF Yo 2 17 7 114 3 6 35 28 16 L 06
ZTF), 578 966 21 81

30 NaF 50 0 21 0 110 5 7 53 26 17 4 13
ZrF), 46 0 76 9 17 36
UF), 4 0 12 6 1 88

31 NaF 50 0 21 0 104k 6 7 53 26 Lo 3 96
ZxF), 50 O 83 6 18 87

32 NaF 52 0 21 8 102 1 7 83 25 95 3 93
ZrF), 418 0 80 3 18 12
 

 

L - 3b -
TABIE 3 (Con't )
CAICULATION OF ROOM TEMPERATURE
DENSITIES OF FLUORIDE MIXTURES
Mol Wt Mol Vol
of of
Mixture Component £, Mif, Mixture (M1/py )1, Mixture PRoom Temp

33 NaF 50 0 21 0 41 L T 53 28 69 L 93
ZrTFy, 25 0 41 8 9 L
UFy 25 0 78 6 11 72

3l NaF 57 O 23 9 95 8 8 58 24 81 3 86
ZrF), 43 0 719 16 23

35 NaF 57 O 23 9 Wi ] 8 59 18 80 2 35
BeFo 43 0 20 2 10 21

36 NaF 55 0 23 1 57 6 8 28 20 12 2 86
BeFp 40 0 18 8 9 50
UFy, 0 15 7 2 3h

37 NaF 50 0 21 0 178 05 T 53 30 97 5 75
UF), 50 0 157 05 23 Ll

38 NaF 50 O 21 0 107 5h 7 53 26 59 4 ob
ZrF), 18 o 80 26 18 12
UFy 20 6 28 ol

39 NaF 65 0 27 3 115 18 9 78 2 82 L 64
ZrF), 15 0 25 08 5 66
UF), 20 0 62 80 9 38

40 NaF 53 0 22 3 106 8 7 98 26 09 4 09
ZrF), 43 0 71 9 16 23
UF), Lo 12 6 1 88

iy NaF 63 0 26 46 105 95 9 48 2L 55 4 32
ZrFy, 25 0 41 8 9 44
UF}, 12 0 37 69 5 63

A § S
s - 35 - :

TABIE 3 (Con't )

CAICUIATION OF ROOM TEMPERATURE
DERNSITIES OF FIUORIDE MIXTURES

 

 

 

Mol Wt Mol Vol
of of (f/
Mixture Component £, M T, Mixture (My/p, ) Mixture Room Te
L2 NaF 6L 5 27 09 129 78 9 71 25 80 5 03
ZxF), 6 0 10 03 2 26
UF), 29 5 92 66 13 83
43 NaF 66 T 28 0 132 6 10 Ok 25 67 5 17
UF), 333 104 6 15 63
Wl NaF 55 5 22 5 109 8 8 05 26 20 4 19
ZxF), 40 O 66 9 15 10 -
UF) 65 20 b 3 05
45 NaF 53 0 22 27 100 87 7 98 o5 72 3 9o
ZrF), 47 0 78 6 17 Th
46 NaF 62 5 26 3 125 7 g9 41 25 85 L 86
ZrF), 12 5 20 9 L 72 _
UF), 25 0 78 5 11 72
W7 NaF 35 1 7 41 1 5 27 18 20 2 26
L1F 20 5 2 2 25
BeFo L5 21 2 10 68
C Test NaF 66 7 28 0 83 7 10 Ok 22 61 3 70
ZTF) 3% 3 55 7 12 57
50-99 (to be hydroxide mixtures)
100 L1F 60 0 15 5 32 3 6 76 12 78 2 53
NaF 40 0 16 8 6 02
101 IaF 57 6 14 9 43 6 6 49 14 15 3 08
NaF 38 4 16 1 518
UFY 1 0 12 6 1 88
_36

/

TABIE 3 (Con't )

CAICULATION OF ROOM TEMPERATURE
DENSITIES OF FLUORIDE MIXTURES

 

 

 

Mol Wt Mol Vol
of of
Mixture Component £, M, T, Mixture (My/p, )E2 Mixture PRoom Temp
102 LiF 50 O 13 0 W2 1 5 63 17 35 2 43
KF 50 O 29 1 11 72
103 IiF 418 0 12 4 52 9 5 41 18 54 2 85
KF 48 0 27 9 11 25
UF), 4 0 12 6 1 88
10L RbF 57 O 59 6 70 T 16 75 21 59 3 27
IaF 43 0 11 1 L 8k
105 RbF 54 7 57 2 80 5 16 07 22 60 3 56
LiF Ll 3 10 7 L 65
UF), Ly 12 6 1 88
(07 T »207 (& 800T,

RS r——

/;ZMC dee §fi?/l/é

J 7L %/07-“/

Foo £ -
(}L&'?}(

Jowin

195¢

A ————

o35 %
Z
W

 

 

_ TARLE ]+
CAICULATED DENSITY-TEMPERATURE REIATIONSHIPS
FOR ALL FLUORIDE MIXTURES
COMPARISON OF CAICULATED RELATIONSHIPS AND
AVATIABIE EXPERIMENTAL REIATIONSHIPS
Composition M P (°C) Calculated Experimental Agreemen'b8 Reference
Density Density

1 480 p =3 60 - 0 00087T

2 530 p =4 55 - 0 00102T p =4 70 - 0 00115T > 2% 2,12

2a, 558 p = 4 4O - O 00099T p = 4 54 - 0 00110T > 24 3,12

3 465 p =324 - 0 000827

4 708 p =560 -0 O0L16T

5 465 p =6 0L - 0 00122T

6 435 p =2 eg - O 00065T fo—
7 575 p =4 78 - 0 0010LT

8 9927 =1
9 8007 :
10 8707

11 88071

12 460 p =2 47 - 0 00068T p =253 - 0 00073T > 29 11

13 %90 p =505 -0 00108T

1k 452 p = 256 - 0 00070T p =2 65 - 0 00090T > 3% 4,12

15 433 p =240 -~ O 00067T

16 500 p = 2 87 - 0 00075T

17 p =2 49 - 0 00069T

18 506 p = 4 54 - 0 00101T

19 1405 p =3 46 - 0 00085T o =378 - 0 00109T 6% (600°c) 5,12

20 450 p =3 38 - 0 00084T

21 540 p =355 -0 00087T p =4 27 - 0 00163T >h% (800%) 5,12

22 605 p =3 69 - 0 00089T
23 450 p =252 -~ 0 0007T0T
2l 450 p =359 -~ 0 00087T

25 545 p =375 - 0 000907 p =378 - O 00091T >1% 5,12

25g, 545 p =371 - 0 00089T p =365 - 0 00080T >1% 5,12

26 540 p =3 82 - 0 00091T

274 510 p =% 97 - 0 00093T
- TABLE 4 (Con't ) ’ 3

CAICUIATED DENSITY-TEMPERATURE RELATIONSHIPS
FOR ALL FLUORIDE MIXTURES
COMPARISON OF CALCUIATED REILATIONSHIPS AND
AVAILABIE EXPERIMENTAL RELATIONSHIPS

 

 

 

Composition M P (°) Calculated Experimental Agreement8 Reference
Densaity Densaity
28 510 p=3T9 - 0 00090T
29 570 p =3 86 - 0 000927
30 520 p =395 -~ 0 00093T
31 510 p =375 - 0 00090T p =379 - O 00093T >1% 6,12
32 500 p =372 - 0 00089T
33 610 p =4 90 - 0 00107T p =509 -0 00159T > 5% 6,12
3h 490 p =3 65 - 0 Q0088T
35 360 p =2 40 - 0 00067T
36 >500 p =2 T6 ~ 0 00073T
37 715 p =616 - 0 001237
38 510 p =3 83 - 0 00091T
39 610 p =4 55 - 0 00102T
40 520 p =389 - 0 00092T p =3 60 - 0 00055T >2% 7
41 595 p = 4 15 - 0 00096T
42 650 p =505 -0 00107T
43 640 p =525 - 0 00111T p =551 -0 00130T >3 8
Wl 545 p =4 00 - 0O 00093T p = 4 Ok - 0 0O110T >3% 9
45 500 p =371l - 0 00089T
L6 635 p = L4 83 -~ 0 00105T p =14 75 - 0 00120T >5% 10
W7 350 + 20° p =2 33 - 0 0006ET
C Test 625 p = 3 49 - 0 00086T
100 652 p =252 -« 0 00069T p =2 42 - 0 00055T >1% 11
101 645 p =295 - 0 00077T
102 492 p = 2 46 -~ 0.00068T
103 >500 p =275 - 0 00073T
104 462 p =310 - O 00079T
105 4657 p =3 3 - 0 00084T
8Agreement or percent difference = Pexp =~ Pecalc % 100
y (Detedpined at 700°C unless 1/2 (pexp + Pcalc )

otherwise stated)

‘QE-