AM_Cronstedtite_2 Formula: Fe3.578 Si1.422 O9 H4 Name: Cronstedtite Unit cell: 5.495 5.495 7.09 90.0 90.0 120.0 , V=185.40 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: Lostwithiel, England, Sample: LOS, Note: 1T polytype