Information card for entry 9001093

Structure parameters

• Mineral name: Eckermannite
• Formula: F2 Mg4.094 Na3 O22 Sc0.906 Si8
• Calculated formula: F2 Mg4.094 Na3 O22 Sc0.906 Si8
• Title of publication: Characterization of cation ordering in synthetic scandium-fluor-eckermannite, indium-fluor-eckermannite, and scandium-fluor-nyboite by Rietveld structure refinement Sample: FScEC-A3
• Authors of publication: Raudsepp, M.; Turnock, A. C.; Hawthorne, F. C.
• Journal of publication: American Mineralogist
• Year of publication: 1987
• Journal volume: 72
• Pages of publication: 959 - 964
• a: 9.8384 Å
• b: 18.0634 Å
• c: 5.2926 Å
• α: 90°
• β: 103.65°
• γ: 90°
• Cell volume: 914.008 ų
• Number of distinct elements: 6
• Space group number: 12
• Hermann-Mauguin space group symbol: C 1 2/m 1
• Hall space group symbol: -C 2y
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No