Information card for entry 9003505

Structure parameters

• Mineral name: Piemontite
• Formula: Al1.75 Ca2 H Mn1.25 O13 Si3
• Calculated formula: Al1.75 Ca2 H Mn1.25 O13 Si3
• Title of publication: An X-ray Rietveld study of piemontite on the join Ca2Al3Si3O12(OH) - Ca2Mn3+3Si3O12(OH) formed by hydrothermal synthesis Sample: q = 1.75, p = 1.26, Synthesis at P=200 MPa, T=500 C
• Authors of publication: Nagashima, M.; Akasaka, M.
• Journal of publication: American Mineralogist
• Year of publication: 2004
• Journal volume: 89
• Pages of publication: 1119 - 1129
• a: 8.8591 Å
• b: 5.7039 Å
• c: 10.1827 Å
• α: 90°
• β: 115.548°
• γ: 90°
• Cell volume: 464.236 ų
• Ambient diffraction temperature: 773.15 K
• Ambient diffracton pressure: 200000 kPa
• Number of distinct elements: 6
• Space group number: 11
• Hermann-Mauguin space group symbol: P 1 21/m 1
• Hall space group symbol: -P 2yb
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No