Standard X-ray Diffraction Powder Patterns

Potossium Chlorate, KCIO3 (monoclinic)—ContinuedLattice constants192919531963Zachariasen [3]__-_ _______levies and Ozols [4]_ _ _National Bureau of Standards at26 °Ca0A4. 6564. 65694. 6553±.00026A5. 5965. 590895. 5905±.0006cA7.0997. 09917. 1006±.0005ft109°38 /109°38.9'109°41.1'±.3'Potassium Lithium Sulfate, KLiSO4 (hexagonal)Powder data cards. None.Additional published patterns. None.NBS sample. The sample of potassium lithiumsulfate was prepared at NBS by dissolving stoichiometricamounts of solid potassium hydroxide andlithium hydroxide in a small amount of water.When the mixture was at room temperature adrop of 1 percent bromcresol-purple was addedand the mixture neutralized with H2SO4 . Thesolution was evaporated to dryness and the precipitate was then heated to about 750 °C tosharpen the pattern. Spectrographic analysisshowed the following impurities: 0.01 to 0.1 percent each of calcium, indium, and sodium; and0.001 to 0.01 percent each of aluminum, rubidium,and silicon.The sample is colorless and optically negative.The indices of refraction are N0 = 1.471 and N e= 1.469.The d-values of the three strongest lines are:3.960, 3.099, and 2.573 A.Structural data. Nowacki [1] in 1942 determined that potassium lithium sulfate has thespace group CJ-P6/3 (No. 173) and 2(KLiSO4)per unit cell. The lattice constants of Nowackihave been converted from kX to angstrom unitsfor comparison with the NBS values.19421963Lattice constantsNowacki [1]. _______ _National Bureau ofStandards at 26°C__aA5. 145. 1457cAa 628. 6298hkl002101102110111103200112201, 004202113203210114,211105212204300213106205214220116222311,304206215107, 312313401, 224216402108403306Internal Standard,Tungsten, a = 3. 1648 ACu, 1.5405 A at 26 Cd0A4. 3203. 9603.0992. 5732.4652. 4182. 2252.2112. 1581. 9811. 9191. 7621. 6831.6531. 60961. 56901. 54991. 48521. 45331. 36871. 36471, 32761. 28641. 25501. 23291. 22371. 20811. 20551. 18801. 13561. 10481. 09391. 07871. 04841. 03891. 03357121007034165820191242311511411223355262331212111The density of potassium lithium sulfate calculated from NBS lattice constants is 2.385g/cm3 at at 26 °C.Reference[1] W. Nowacki, Beziehungen zwischen K[AlSiO 4 ] (Tiet-Kaliophilit), Ba[Al2O4 ], K[LiSO 4 ], Na[AlSiO 4 ] (Nephelin)und SisO* (0-Tridymit), Naturwissenschaften30, 471-472 (1942).43