o Py’ P DOCUMENT COLLECTION T 3 445k D349LYL 5 ORNL 1712 Chemistry=General G Lodbed | hl—‘t R l, 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