Abstract
Ca2P2O7·4H2O, monoclinicP21/c, a=6.008(1),b=25.034(4),c=6.837(1) Å,β=109.7 (1)°,Z=4,D 0=2.20,D c =2.24 g cm−3. The structure was solved by direct methods and refined by block-diagonal matrix least squares to a finalR value of 0.038. Both calcium atoms are seven coordinate. The\(\overline {P - O_T } \) distance is 1.510(6) Å, whereas the\(\overline {P - O_B } \) distance is 1.619(1) Å and the P-OB-P angle is 125.9(1)°.
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Davis, N.L., Mandel, G.S., Mandel, N.S. et al. Structure of monoclinic dicalcium pyrophosphate tetrahydrate. Journal of Crystallographic and Spectroscopic Research 15, 513–521 (1985). https://doi.org/10.1007/BF01171054
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DOI: https://doi.org/10.1007/BF01171054