Information card for entry 9003556

Structure parameters

• Mineral name: NaNa2Mg5Si8O21(OH)3
• Formula: H3 Mg5 Na3 O24 Si8
• Calculated formula: H3 Mg5 Na3 O24 Si8
• Title of publication: The crystal structure of synthetic NaNa2Mg5Si8O21(OH)3, a triclinic C-1 amphibole with a triple-cell and H excess Note: occupancies unreported, so calculated formula has an extra OH
• Authors of publication: Camara, F.; Oberti, R.; Della Ventura, G.; Welch, M. D.; Maresch, W. V.
• Journal of publication: American Mineralogist
• Year of publication: 2004
• Journal volume: 89
• Pages of publication: 1464 - 1473
• a: 9.883 Å
• b: 54.082 Å
• c: 5.277 Å
• α: 90.045°
• β: 103.068°
• γ: 89.96°
• Cell volume: 2747.47 ų
• Number of distinct elements: 5
• Space group number: 2
• Hermann-Mauguin space group symbol: C -1
• Hall space group symbol: -P 1 (1/2*x+1/2*y,1/2*x-1/2*y,-z)
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No