Natroapophyllite Formula: Si8 Ca4 Na F O28 H16 Name: Natroapophyllite Unit cell: 8.875 8.881 15.79 90.0 90.0 90.0 , V=1244.55 Space group: PNNM (58)
Miura Y , Kato T , Rucklidge J C , Matsueda H , American Mineralogist , 66 (1981) p.410-423, Natroapophyllite, a new orthorhombic sodium analog of apophyllite, II. Crystal structure