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S5k B FLUORIDE AND CHLORIDE COMPOUNDS
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T. N. McVay
G. D. White

CENTRAL RESEARCH LIBRARY
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OAK RIDGE NATIONAL LABORATORY

OPERATED BY

CARBIDE AND CARBON CHEMICALS COMPANY

A DIVIBION OF UNION CARBIDE AND CARBON CORPORATION

N .

POST OFFICE BOX P
CAK RIDGE, TENNESSEE

 

CENTRAL RESLARCH LIBRARY
 

ORNL 1712

Copy No. é>

Contract No. W-T405-eng-26

METALLURGY DIVISION

THE OPTICAL PROPERTIES OF SOME INORGANIC

FLUCRIDE AND CHLORIDE COMPOUNDS

T, N. McVay
G. D. White

DATE ISSUED

MAY 5 1954

 

OAK RIDGE NATTONAT. LABORATORY
Operated by
CARBIDE AND CARBON CHEMICAIS COMPANY
A Division of Union Carbide and Carbon Corporation
Post Office Box P
Cak Ridge, Tennessee

. MARTIN MARIETTA ENERGY SYSTEMS LIBRARIES

3 445k 0349L4E &

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 
THE OPTICAL PROPERTIES
OF SOME INORGANIC FLUCRIDE
AND CHLORIDE COMPOUNDS

T. N. McVay and G. D. White
Metallurgy Division

ABSTRACT

Optical properties are listed for various fluoride and chloride
compounds.

INTRODUCTION

In the course of investigation of various inorganic fluoride
and chloride systems, it was found advisable to determine the optical
properties of numerous fluoride and chloride compounds.

The optical data collected on these substances are recorded in
this report. The refractive indices are believed to be precise to
+ 0.003; the optic angles of biaxial crystals were estimsted.

The authors wish to acknowledge the assistance of W. C. Whitley,
B. J. Sturm, R. J. Sheil, J., Truitt and Virginis Coleman, who pre-
pared the samples under the direction of C. J. Barton and W. R. Grimes
of the Materials Chemistry Division, of which G. H. Clewett is the
head. ’
-2

OPTICAL PROPERTIES

Beryllium leed fluoride, BeFs-PbFo

Biaxial - 2V = T0°
a = 1.602 y = 1,627
Colorless
Cesium uranium fluoride, CsF-UFL
Biaxial + 2v = 4s°
@ = 1.553 7 = 1.560
Polysynthetic twinning, X A ¢ = 10°
Z = Bky blue X = greenish blue
Cesium uranium fluoride, 2 CsF-UF)
Biaxisl + 2V = h5°
a = 1.516 y = 1.52k
Z = light blue X = light greenish blue

Cesium zirconium fluoride, CsF-ZrFy

20° - 45° (varies)
1.476

Biaxial - 2V
a = 1.464 ¥

Colorless

Cesium zirconium fluoride, 2 CsF-ZrF)

Uniaxial -
0 = 1.h82 E
Colorless

1.460

Iron fluoride, FeFop

Uniaxial +
0 = 1.52k E
Brown

1.540

lead uranium fluoride, PbFop-UFy

Uniaxial =
0 = 1.750 E
Green

1.730
-3 -

Lead uranium fluoride, 6 PbFp'UFy
Isotropic
n=1.77
Light Dblue
Lithium beryllium fluoride, LiF-BeFp
Uniaxial +
0 =1.312 E = 1.319
Colorless

Lithium chromium fluoride, 3 LiF'CrF3

Biaxial - oV = 40°
X normal to one face
a = 1.klk y = 1.46L
Green

Lithium uranium fluoride, LiF-2UFy
Biaxial - 2V = 10°
a = 1.584 y = 1.600
Yellowish green

Lithium uranium fluoride, 3 LiF-UFy
Biaxial + 2v = 45°
a = 1.468 Yy = 1.476
Z = dark green X = light green

Lithiwn zZirconium fluoride, LiF-ZrF),
Biaxial + 2v = 30°
o = lah‘68 Y = l.h76
Colorless

Lithium zirconium fluoride, 2 LiF-ZrFy
Uniaxisl +
0 = 1.k62 E = 1.ho2
Colorless

Manganese fluoride, MnFp
Uniaxial +
0 = 1.476 E = 1.50k
0 = colorless E = gray
-4 -

Potassium aluminum fluoride, 3 KFeAlF3
Isotropic
n = 1.376

Colorless

Potassium chromium fluoride, 3 KF-CrF3

Isotropic
n = 1,422
Green

Potassium fluoride, acid KF-HF
Uniaxial - Some crystals show small optic angle.
0 = 1.35h E = 1.331
Colorless

Potassium sodium iron fluoride, 2 KF-HaF-FeF3
Isotropic
n = 1.414
Colorless

Potassium thorium fluoride, 3 KF-ThF),
Isotropic
n = 1.h2k

Colorless

Potassium uranium chloride, KC1-UCl)

Biaxial + 2V = small

o= 1.692 B = 1.705

X = gray Z = blue-green
Potassium uranium fluoride, KF.UF)

Uniaxiasl -

0 = 1.510 E = 1.504

Green
Potassium uranium fluoride, 2 KF-UFh

Uniaxial +

0 = 1.484 E = 1.512

Light olive drab
-5 -

Potagsium zirconium fluoride, KF.Zr¥y

750
1.50h

Biaxial + 2V
a = 1.488 ¥
Colorless :

Rubidium beryllium fluoride, RbF-BeFp

Biexial +
n av. = 1.390 with low birefringence
Colorless

Rubidium uranium fluoride, Rb-UF}

Biaxial -

a = 1.51h

Polysynthetic twinning, Y Ac
Z = blue

no
R <

QU N
0

=

\n

o

\n
R
o

2

>4

green
Rubidium uranium fluoride, 2 RbF-UF)

Biaxial + 2V =
a = 1.473 Y =
Z = light violet T

Rubidium uranium fluoride, 3 RbF-UFy

Isotropic
n= lol"38

Green
Rubidium zirconium fluoride, 2 RbF.ZrF),

Uniaxial -
0 = 1.438 E = 1.432
Colorless

Rubidium zirconium fluoride, 3 RbF-ZrF),

Isotropic
n = 1.432
Colorless

Sodium beryllium fluoride, NaF-.BeFp

Biaxial

n = 1.312 with low birefringence
Iength slow

Colorless
Sodium beryllium fluoride, 2 NaF-BeFo

Sodium

Sodiwm

Sodium

Sodium

Sodium

Sodium

Sodium

-6 -

Biaxial

n = 1.303 with low birefringence

Ylle
Colorless

chromium fluoride, 3 NaF-CrF3

Isotropic
n=1.411
Green

fluoride, acid NaF-HF

Uniaxial +
0 = 1,261
Colorless

thorium fluoride, 2 NaF-ThF),

Uniaxial +
0 = 1.468

Colorless
uranium chloride, 2 NaCl-UCl),

Uniaxigl -
0 = 1.664

Pale green
uranium fluoride, NaF-UF),

Uniaxial -
0 = 1,520
Green

uranium fluoride, 2 NaF.UFL
Uniaxial -~
0 = 1.495
Green

uranium fluoride, 3 NaF-UFy

Uniaxisl -
0 =1.417
Greenish blue

i

1.328

1.496

1.652

1.512

1.490

1.412
-7 =

Sodium zirconium fluoride, 3 NaF-4 Zrm,

Biaxigl + 2V = 30°
a = 1.420 y = 1.432
Colorless

Sodium zirconium fluoride, NaF.ZrFj
Uniaxial -
0 = 1.508 E = 1.500

Indices vary depending on NaF:ZrF) ratio
Appears to be a solid solution
Colorless

Sodium zirconium fluoride, 2 NaF-ZrF),

759
1.419

Biaxial =~ 2V
a = 1.412
Colorless

~2
wou

Sodium zirconium fluoride, 3 NaF.ZrFy,

Uniaxial -
0 =1.386 E
Colorless

1.381

Thorium fluoride, ThF}
Isotropic
n=1.532
Colorless
Uranium chloride (III) UC13
Uniaxial, probably -
High index 2.0k Low index 1.9k
Dark brownish red

Uranium chloride (III) UCLy,

Uniaxial -
0 =2.03 E=1.95
Z = greenish brown X = light brownish green

Zirconium chloride ZrClh

Probably monoclinie

Biaxial Large 2V
y = 1.83 a=1.76
ZAc 22°

White