AM_Whewellite Formula: Ca2 C4 O10 H2.57 Name: Whewellite Unit cell: 6.29 14.583 10.116 90.0 109.46 90.0 , V=874.90 Space group: P121/C1 (14)

Tazzoli V , Domeneghetti M C , American Mineralogist , 65 (1980) p.327-334, The crystal structures of whewellite and weddellite: re-examination and, comparison