Information card for entry 9001513

Structure parameters

• Mineral name: Dravite
• Formula: Al6.078 B3 Ca0.009 Cr0.006 Fe0.612 K0.014 Mg2.274 Mn0.003 Na0.814 O34 Si6 Ti0.03
• Calculated formula: Al6.078 B3 Ca0.009 Cr0.006 Fe0.612 K0.014 Mg2.274 Mn0.003 Na0.814 O34 Si6 Ti0.03
• Title of publication: Reassignment of cation site occupancies in tourmaline: Al-Mg disorder in the crystal structure of dravite
• Authors of publication: Hawthorne, F. C.; MacDonald, D. J.; Burns, P. C.
• Journal of publication: American Mineralogist
• Year of publication: 1993
• Journal volume: 78
• Pages of publication: 265 - 270
• a: 15.947 Å
• b: 15.947 Å
• c: 7.214 Å
• α: 90°
• β: 90°
• γ: 120°
• Cell volume: 1588.78 ų
• Number of distinct elements: 12
• Space group number: 160
• Hermann-Mauguin space group symbol: R 3 m :H
• Hall space group symbol: R 3 -2"
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No