Standard X-ray Diffraction Powder Patterns

Lithium Phosphate, low form (iithiophosphate), Li3PO4 (orthorhombic)Powder data cards The dengity of lithium phosphate, low form,calculated from the NBS lattice constants is 2.480g/cm3 at 25 °C.Cardnumber12-230Indexlines3.983. 802.67Fisher [1] 1958.SourceA high form is obtained from samples that havebeen heated above approximately 500 °C.Additional published pattern. Matias and Bondareva[2] 1957.NBS sample. The sample of lithium phosphatewas obtained from the City Chemical Co., NewYork, N.Y. Spectrographic analysis showed thefollowing major impurities: 0.1 to 1.0 percent calcium; 0.01 to 0.1 percent each of aluminum, sodium, and strontium; and 0.001 to 0.01 percenteach of barium, iron, magnesium, and silicon.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:3.973, 3.797, and 2.640 A.Structural data. Zemann [3] in 1960 studied acrystal of Li3PO4 that had been grown in moltenLiCl and determined that it has the space groupD^-Pmnb (No. 62) and 4(Li3PO4 ) per unit cell.We find that the lower form apparently has thesame structure with only slight changes in thelattice constants, principally in the c-direction.The cell constants of Zambonini and Laves havebeen converted from kX to angstrom units forcomparison with the NBS values.19321963Zambonini andLaves [4],National Bureauof Standardsat 25 °C.Lattice constantsaA6.086. 1155± . 00046A10. 2810. 467±.001cA4. 874. 8452± . 0005References[1] D. J. Fisher, Note on Iithiophosphate. Am. Mineralogist43, 761-2 (1958).[2] V. V. Matias and A. M. Bondareva, Lithiophosphate,a new mineral, Doklady Akad. Nauk S.S.S.R.112, 124-6 (1957); an English abstract exists inAm. Mineralogist 42, 585 (1957).[3] J. Zemann, Die Kristallstrukturvon Lithiumphosphat,Li3PO 4 , Acta Cryst. 13, 863-7 (1960).[4] F. Zambonini and F. Laves, Uber die Kristallstrukturdes Li3PO4 und seine Beziehung Zum Strukturtypdes Olivin, Z. Krist. 83, 26-28 (1932).3Shkl020120101021121200220040002221041022141122320, 202301241222321142160061340161103023, 312400260123420421223143440080402262053, 361303422243280520501281442460343380Internal StandardSilver, a = 4.0861 ACu, 1.5405 A at 25 Cd0A5.2323. 9733. 7973. 5543. 0713. 0592.6402. 6162.4232.3182. 3032. 1992. 1552. 0701. 8991. 8791. 8391. 7851. 7691. 70741. 67771. 64151. 60831. 58551. 56161. 54311. 52871. 51521. 49591. 46751. 40431. 37761. 34091. 32031. 30781. 29311. 28481. 27881. 26561. 25501. 25331. 20271. 1909L 18601. 16761. 15911. 14981. 13941. 1014/341009856| 266436471 1