Information card for entry 9001564

Structure parameters

• Mineral name: Poldervaartite
• Formula: Ca1.67 H2 Mn0.33 O5 Si
• Calculated formula: Ca1.67 H2 Mn0.33 O5 Si
• Title of publication: Poldervaartite, Ca(Ca0.5Mn0.5)(SiO3OH)(OH), a new acid nesosilicate from the Kalahari manganese field, South Africa: Crystal structure and description
• Authors of publication: Dai, Y. S.; Harlow, G. E.; McGhie, A. R.
• Journal of publication: American Mineralogist
• Year of publication: 1993
• Journal volume: 78
• Pages of publication: 1082 - 1087
• a: 9.398 Å
• b: 9.139 Å
• c: 10.535 Å
• α: 90°
• β: 90°
• γ: 90°
• Cell volume: 904.833 ų
• Number of distinct elements: 5
• Space group number: 61
• Hermann-Mauguin space group symbol: P b c a
• Hall space group symbol: -P 2ac 2ab
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No