AM_Cronstedtite_3 Formula: Fe3.44 Si1.56 O9 H4 Name: Cronstedtite Unit cell: 5.501 5.501 7.106 90.0 90.0 120.0 , V=186.23 Space group: P31M (157)

Hybler J , European Journal of Mineralogy , 18 (2006) p.197-205, Parallel intergrowths in cronstedtite-1T:, determination of the degree of disorder, Locality: Roznava, Slovakia, Sample: ROZ, Note: 1T polytype