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Jahnsite-(MnMnMn) Mineral Data + |
General Jahnsite-(MnMnMn) Information |
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| MnMnMn2Fe+++2(PO4)4(OH)2·8(H2O) | |||
| Molecular Weight = 889.47 gm | |||
| Manganese 24.71 % Mn 31.90 % MnO | |||
| Iron 12.56 % Fe 17.95 % Fe2O3 | |||
| Phosphorus 13.93 % P 31.92 % P2O5 | |||
| Hydrogen 2.04 % H 18.23 % H2O | |||
| Oxygen 46.77 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Mn2+Mn2+Mn2+2Fe3+2(PO4)4(OH)2·8(H2O) | |||
| Not Approved IMA 1990 | |||
| Stewart mine, Pala, San Diego County, California, USA. Link to MinDat.org Location Data. | |||
| Named for Richard H. Jahns (1915-1983), mineralogist and pegmatite expert, Stanford University, Palo Alto, California, USA. | |||
Search for Jahnsite-(MnMnMn) Images | |||
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Jahnsite-(MnMnMn) Crystallography |
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| a:b:c =2.0774:1:2.5933 | |||
| a = 15.02, b = 7.23, c = 18.75, Z = 4; beta = 100.42° V = 2,002.57 Den(Calc)= 2.95 | |||
| Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2/a | |||
Physical Properties of Jahnsite-(MnMnMn) |
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| None | |||
| Brown, Purplish brown, Yellow, Yellow orange. | |||
| Transparent to Translucent | |||
| 4 - Fluorite | |||
| Vitreous - Adamantine | |||
| white | |||
Optical Properties of Jahnsite-(MnMnMn) |
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| CI calc= 0.018 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2355,KC= 0.2398 |
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| Biaxial (-), a=1.682, b=1.695, g=1.707, bire=0.0250 | |||
Calculated Properties of Jahnsite-(MnMnMn) |
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relectron=2.91 gm/cc |
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| Fermion Index = 0.00288 Boson Index = 0.99712 |
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PEJahnsite-(MnMnMn) = 10.64 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Jahnsite-(MnMnMn) is Not Radioactive |
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Jahnsite-(MnMnMn) Classification |
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| 42.11.2.4 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen | |||
| (42.11)where (AB)4 (XO4)3 Zq · x(H2O) | |||
| (42.11.2)Dana Group | |||
| VII/D.29-75 VII - Phosphates, Arsenates and Vanadates | |||
| VII/D - Water-bearing phosphates with unfamiliar anions, cations of very big and medium size: Al, Mg and Ca, Na, K | |||
| VII/D.29 - Whiteite - Jahnsite group | |||
Other Jahnsite-(MnMnMn) Information |
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| NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8) | |||
| Links to other databases for Jahnsite-(MnMnMn) : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas Search for Jahnsite-(MnMnMn) using: Visit our Advertisers for Jahnsite-(MnMnMn) : Translate Jahnsite-(MnMnMn) Mineral Data : Ask about Jahnsite-(MnMnMn) here : Print or Cut-and-Paste your Jahnsite-(MnMnMn) Specimen Label here :
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