Information card for entry 9001272

Structure parameters

• Mineral name: Birnessite
• Formula: H3.7 K0.23 Mn O2.7
• Calculated formula: H1.4 K0.23 Mn O2.7
• Title of publication: Crystal structure determinations of synthetic sodium, magnesium and potassium birnessite using TEM and the Rietveld method Sample: K-birn
• Authors of publication: Post, J. E.; Veblen, D. R.
• Journal of publication: American Mineralogist
• Year of publication: 1990
• Journal volume: 75
• Pages of publication: 477 - 489
• a: 5.149 Å
• b: 2.843 Å
• c: 7.176 Å
• α: 90°
• β: 100.76°
• γ: 90°
• Cell volume: 103.2 ų
• Number of distinct elements: 4
• 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