Information card for entry 9000954

Structure parameters

• Mineral name: Helvine
• Formula: Be3 Mn4 O12 S Si3
• Calculated formula: Be3 Mn4 O12 S Si3
• Title of publication: The crystal structures of helvite group minerals, (MnFeZn)8(Be6Si6O24)S2
• Authors of publication: Hassan, I.; Grundy, H. D.
• Journal of publication: American Mineralogist
• Year of publication: 1985
• Journal volume: 70
• Pages of publication: 186 - 192
• a: 8.236 Å
• b: 8.236 Å
• c: 8.236 Å
• α: 90°
• β: 90°
• γ: 90°
• Cell volume: 558.662 ų
• Number of distinct elements: 5
• Space group number: 218
• Hermann-Mauguin space group symbol: P -4 3 n
• Hall space group symbol: P -4n 2 3
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No