Standard X-ray Diffraction Powder Patterns

Cesium Chromate, Cs>CrO 4 (orthorhombic)Powder data cards. None.Additional published patterns. None.NBS sample. The sample of cesium chromatewas obtained from the Fairmount Chemical Co.Inc., Newark, N.J, Spectrographic analysisshowed the following major impurities: 0.1 to 1.0percent rubidium; 0.01 to 0.1 percent each ofpotassium and sodium; and 0.001 to 0.01 percenteach of aluminum, barium, calcium, and silicon.The color of the sample was yellow and it isoptically positive. The refractive indices areN«=1.750, N0=1.753, and N y=1.762.The d-values of the three strongest lines are:3.342, 3.207, and 3.364 A.Structural data. Miller [1] in 1938 determinedthat cesium chromate has the potassium sulfatestructure, the space group Dgh-Pnam (No. 62)with 4(Cs2CrO4 ) per unit cell.The lattice constants reported by Miller havebeen converted from kX to angstrom units forcomparison with NBS values.19381963Miller [!]______,National Bureauof Standards25°C. __..____Lattice constantsaA8.3808. 429± 0. 001b£11. 15711. 190±0. 001cA6. 2396. 302± 0. 001The density of cesium chromate calculated fromthe NBS lattice constants is 4.266 g/cm3 at 25 °C.Reference[1] J. J. Miller, The structure of Cs2 CrO 4) Z. Krist. 99A,32-37 (1938).hkl120111200210121201130220211031002131221230310140122231311212141321, 240132222330241150051, 400232312113401340250420411123341242060213430033332152431402161ago143441Internal Standard, 0Tungsten, a 3.1 648 ACu, 1.5405 A at 25 CdA4. 664. 6024. 2133. 9463. 7493. 5053. 4113. 3643. 3423. 2073. 1502. 9982.9692. 7942. 7252. 6542. 6112. 5542. 5012.4632. 4492. 3312. 3142.3012. 2442. 1862. 1632. 1092. 0902. 0622. 0041. 9991. 9821. 9771. 9711. 9671. 91521. 89111. 87431. 86531. 85421. 83491. 83081. 82801. 78331. 76151. 75211. 74991. 70601. 64741. 6263/8982069182177100876681724341115661717133129138151015151097101488267613619816411647625