Information card for entry 1556735

Structure parameters

• Common name: New structure
• Mineral name: maruyamaite, K-rich tourmaline
• Formula: Al7 B3 K Mg2 O28 Si6
• Calculated formula: Al6.099 B3 Ca0.26 Fe0.6 K0.53 Mg2.187 Na0.19 O31 Si5.97 Ti0.141
• Title of publication: Maruyamaite, K(MgAl2)(Al5Mg)Si6O18(BO3)3O, a potassium-dominant tourmaline from the ultrahigh-pressure Kokchetav massif, northern Kazakhstan: Description and crystal structure
• Authors of publication: Lussier, A.; Ball, N.A.; Hawthorne, F.C.; Henry, D.J.; Shimizu, R.; Ogasawara, Y.; Ota, T.
• Journal of publication: American Mineralogist
• Year of publication: 2016
• Journal volume: 101
• Pages of publication: 355 - 361
• a: 15.955 ± 0.01 Å
• b: 15.955 ± 0.01 Å
• c: 7.227 ± 0.004 Å
• α: 90°
• β: 90°
• γ: 120°
• Cell volume: 1593.2 ± 1.7 ų
• Ambient diffraction temperature: 298 K
• Ambient diffracton pressure: 100 kPa
• Number of distinct elements: 6
• 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