Crystal structure of collinsite

Abstract

The crystal structure of a substantially pure sample of collinsite, MgCa2(PO4)2,2H2O, has been determined from diffractometer data (379 independent reflections) and refined by full-matrix least squaresmethods to a residual of 0.033. Crystals are triclinic, PI, a = 5.7344(8), b = 6.780(1), c = 5.4413(9) Å, α = 97.29(1), β= 108.56(1), γ = 107.28(1)º, Z = 1.