Information card for entry 9001061

Structure parameters

• Mineral name: Pargasite
• Formula: Al2 Ca2 Cr0.48 F2 Mg4.52 Na O22 Si6
• Calculated formula: Al2 Ca2 Cr0.48 F2 Mg4.52 Na O22 Si6
• Title of publication: Characterization of synthetic pargasitic amphiboles (NaCa2Mg4M3+Si6Al2O22(OH,F)2; M3+ = Al,Cr,Ga,Sc,In) by infrared spectroscopy, Rietveld structure refinement, and 27Al, 29Si, and 19F MAS NMR spectroscopy Sample: FCrPA-A3
• Authors of publication: Raudsepp, M.; Turnock, A. C.; Hawthorne, F. C.; Sherriff, B. L.; Hartman, J. S.
• Journal of publication: American Mineralogist
• Year of publication: 1987
• Journal volume: 72
• Pages of publication: 580 - 593
• a: 9.8402 Å
• b: 17.98 Å
• c: 5.2914 Å
• α: 90°
• β: 105.108°
• γ: 90°
• Cell volume: 903.832 ų
• Number of distinct elements: 8
• 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