Information card for entry 9010636

Structure parameters

• Mineral name: Demartinite
• Formula: F6 K2 Si
• Calculated formula: F6 K2 Si
• Title of publication: Demartinite, a new polymorph of K2SiF6 from La Fossa Crater, Vulcano, Aeolian Islands, Italy Locality: La Fossa Crater, Vulcano Island, Aeolian Archipelago, Sicily, Italy
• Authors of publication: Gramaccioli, C. M.; Campostrini, I.
• Journal of publication: The Canadian Mineralogist
• Year of publication: 2007
• Journal volume: 45
• Pages of publication: 1275 - 1280
• a: 5.6461 Å
• b: 5.6461 Å
• c: 9.2322 Å
• α: 90°
• β: 90°
• γ: 120°
• Cell volume: 254.878 ų
• Number of distinct elements: 3
• Space group number: 186
• Hermann-Mauguin space group symbol: P 63 m c
• Hall space group symbol: P 6c -2c
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No