Standard X-ray Diffraction Powder Patterns

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$Standard X-ray Diffraction Powder Patterns$

$Standard X-ray Diffraction$

Terbium Arsenate, TbAsO4 (tetragonal)Powder data cards. None.Additional published patterns. None.NBS sample. The sample of terbium arsenatewas prepared at NBS from a water solution ofarsenic pentoxide and terbium trichloride. Itwas dried at 110 °C. Spectrographic analysisshowed the following major impurities: 0.01 to0.1 percent silicon; 0.001 to 0.1 percent each ofantimony, calcium, iron, magnesium, and lead.The sample was colorless. The indices of refraction could not be determined because thesample was too fine.The d-values of the three strongest lines are:3.550, 2.685, and 1.834 A.Structural data. No reference to the structureof terbium arsenate was found, but it is apparentlyisostructural with yttrium arsenate with the spacegroup DJ£-l4i/amd (No. 141) and 4(TbAsO4 ) perunit cell.Lattice constants1963 National Bureau ofStandards at 25 °C.aoA7. 1025cA6. 3536The density of terbium arsenate calculated fromthe NBS lattice constants is 6.172 g/cm3 at 25 °C.hkl101200112220202301103321312400420332204224512440600, 404532424116444316604624Internal Standard, 0Tungsten, a = 3.1648 ACo, 1.7889 A at 25 CdoA4. 7363. 5502. 6852. 5102. 3672. 2192.0291. 8821. 8341. 7751. 58781. 48091. 45001. 3423L 27551. 25531. 18381. 13731. 12301. 03640. 9849. 9577. 9495. 9168/81006922798653161514118134881245735Thallium Chromate, Tl 2CrO 4 (orthorhombic)Powder data cards. None.Additional published patterns. Abbad andRivoir [1] 1947.NBS sample. The sample of thallium chromatewas prepared at NBS from solutions of thalliumnitrate and sodium chromate. Spectrographicanalysis showed the following major impurities:0.1 to 1.0 percent lead; 0.01 to 0.1 percent eachof aluminum and silicon; and 0.001 to 0.01 percent each of barium, calcium, and antimony.The color of the sample was yellow. The refractive indices could not be determined becausethe sample was too fine.The rf-values of the three strongest lines are:3.145, 3.060, and 3.186 A.Structural data. Abbad and Rivoir [1] in 1947determined that thallium chromate has the potassium sulfate structure, the space group Dih-(No. 62), and 4(Tl 2CrO4 ) per unit cell.The lattice constants reported by Abbad andRivoir have been converted from kX to angstromunits for comparison with the NBS values.19471963Abbad and Rivoir[!]____________National Bureauof Standardsat 25 °C—_--.Lattice constantsaA7. 827.908±.001boA10. 7010. 730±. 001cA5. 925.913±. 001The density of thallium chromate calculatedfrom the NBS lattice constants is 6.946 g/cm3at 25 °C.54
Thallium Chromate, Tl2CrO4 (orthorhombic)—ContinuedhklInternal Standard, 0Tungsten, a=3.1648 ACu, 1.5405 A at 25 ChklInternal Standard,Tungsten, a ==3. 1648 ACu, 1.5405 A at 25 Cd/d/020Oil120111210A5. 375. 194. 454. 3373. 71458122315430033332152161A1. 73051. 72591. 72351. 69631. 672622191415131212011302202113. 5533. 2903.2633. 1863. 145542724571004314022604122521. 66031. 64341. 62941. 62501. 590395556031002221040, 1122303.0602. 9582. 8052. 6852.654965314616422, 2611430625205111. 57131. 55731. 52991. 51671. 512510366668755465344655563101401223203112. 5612.5402. 4612. 3662. 3492825158131704320710045211. 50451. 49311. 48371. 47821. 46961412122403211322. 3362. 3142. 2212. 1972. 1911010111513450361262] 24, 4424031. 45391. 43551. 42711. 40201. 39592223302411500512. 1672. 1222.0792.0712.017329171544135403435221341. 38421. 36231. 36021. 34981. 3462440232151312142250401420322,4111233410602422032131.9771. 9751.9541. 9361. 92701. 88631. 87501. 85531. 84721. 80131. 79211. 78851. 77551. 76401. 740919166141391215142626147717Reference080, 172,2243706001. 34101. 32501. 3182[1] M. Abbad and L. Rivoir, La estructura del cromatotalioso, Anales Soc. espafi. fis. y. quim 43, 831-836(1947)6455
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Page 3 and 4:
UNITED STATES DEPARTMENT OF COMMERC
Page 5 and 6:
Introduction.. _ __________________
Page 7 and 8:
STANDARD X-RAY DIFFRACTION POWDER P
Page 9 and 10: D. E. Appleman, and D. Handworker.
Page 11 and 12: Ammonium Fluoberyllate, (NH4) 2BeF4
Page 13 and 14: Ammonium Fluoborate, NH4BF4 (orthor
Page 15 and 16: Arsenic Trioxide, claudetite, As2O3
Page 17 and 18: Powder data cardsBarium Stannate, B
Page 19 and 20: Bismuth Orthophosphate, BiPO4 (trig
Page 21 and 22: Bismuth Orthovanadate (high form),
Page 23 and 24: Bismuth Telluride (tellurobismuthit
Page 25 and 26: Cadmium Perchlorate Hexahydrate, Cd
Page 27 and 28: Cadmium Telluride, CdTe (cubic)Powd
Page 29 and 30: Calcium Fluoride Phosphate (fluorap
Page 31 and 32: Cesium Chromate, Cs>CrO 4 (orthorho
Page 33 and 34: Cobalt Fluosilkate Hexahydrate, CoS
Page 35 and 36: Copper Sulfate (chalcocyanite), CuS
Page 37 and 38: Erbium Arsenate, ErAsO4 (tetragonal
Page 39 and 40: Gallium Arsenide, GaAs (cubic)Powde
Page 41 and 42: Indium Arsenide, InAs (cubic)Powder
Page 43 and 44: Lanthanum Niobium Titanium Oxide, L
Page 45 and 46: Lithium Phosphate, high form, Li3PO
Page 47 and 48: Magnesium Ammonium Phosphate Hexahy
Page 49 and 50: Potossium Chlorate, KCIO3 (monoclin
Page 51 and 52: Potassium Zinc Decavanadate 16 Hydr
Page 53 and 54: Silver Antimony Telluride, AgSbTe2
Page 55 and 56: Sodium Trimetaphosphate, Na3P3O9 (o
Page 57 and 58: Sodium Trimetaphosphate Monohydrate
Page 59: Strontium 1:1 Berate, SrO-B2O3 (ort
Page 63 and 64: Titanium Dioxide, brookite, TiO2 (o
Page 65 and 66: CUMULATIVE INDEX TO CIRCULAR 539, V
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Standard X-ray Diffraction Powder Patterns

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