Information card for entry 9012180

Structure parameters

• Mineral name: Weberite
• Formula: Al F7 Mg Na2
• Calculated formula: Al F7 Mg Na2
• Title of publication: What is the true space group of weberite? Sample: Imm2 refinement, T = 133 K
• Authors of publication: Knop, O.; Cameron, T. S.; Jochem, K.
• Journal of publication: Journal of Solid State Chemistry
• Year of publication: 1982
• Journal volume: 43
• Pages of publication: 213 - 221
• a: 7.05 Å
• b: 9.979 Å
• c: 7.297 Å
• α: 90°
• β: 90°
• γ: 90°
• Cell volume: 513.358 ų
• Ambient diffraction temperature: 133 K
• Number of distinct elements: 4
• Space group number: 44
• Hermann-Mauguin space group symbol: I m m 2
• Hall space group symbol: I 2 -2
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No