Information card for entry 9008375

Structure parameters

• Mineral name: Helvine
• Formula: Be3 Mn4 O12 S Si3
• Calculated formula: Be3 Mn4 O12 S Si3
• Title of publication: The effect of pressure on helvite Mn8S2[Be6Si6O24] Sample: P = 36 kbar
• Authors of publication: Kudoh, Y.; Takeuchi, Y.
• Journal of publication: Zeitschrift fur Kristallographie
• Year of publication: 1985
• Journal volume: 173
• Pages of publication: 305 - 312
• a: 8.214 Å
• b: 8.214 Å
• c: 8.214 Å
• α: 90°
• β: 90°
• γ: 90°
• Cell volume: 554.197 ų
• Ambient diffracton pressure: 3600000 kPa
• 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