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crystal data
D-Methionine and D-tyrosine, crystallized from water as microcrystals, were studied by applying the techniques of X-ray powder diffractometry. D-methionine is monoclinic with a = 15.189(4), b = 10.298(3), c = 9.435(3) Å, β = 92°28 (1)′, Z = 8, Dm = 1.325(5), Dx = 1.343 Mg m−3, V = 1474(1) Å3, and space group P21. D-Tyrosine is orthorhombic with a = 20.716(6), b = 13.736(4), c = 5.842(2) Å, Z = 8, Dm = 1.425(5), Dx = 1.447 Mg m−3, V = 1662(2) Å3 and space group P2122. The JCPDS Diffraction File Nos. are: 37-1997 for D-tyrosine; 37-1998 for D-methionine.