Information card for entry 9009522

Structure parameters

• Mineral name: Tweddillite
• Formula: Al1.43 Ca Fe0.257 H Mn1.313 O13 Si3 Sr
• Calculated formula: Al1.43 Ca Fe0.25667 H Mn1.31333 O13 Si3 Sr
• Title of publication: Manganvesuvianite and tweddillite, two new Mn3±silicate minerals from the Kalahari manganese fields, South Africa
• Authors of publication: Armbruster, T.; Gnos, E.; Dixon, R.; Gutzmer, J.; Hejny, C.; Dobelin, N.; Medenbach, O.
• Journal of publication: Mineralogical Magazine
• Year of publication: 2002
• Journal volume: 66
• Pages of publication: 137 - 150
• a: 8.934 Å
• b: 5.718 Å
• c: 10.325 Å
• α: 90°
• β: 114.54°
• γ: 90°
• Cell volume: 479.805 ų
• Number of distinct elements: 8
• 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