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Hennomartinite Mineral Data + |
General Hennomartinite Information |
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| SrMn+++2Si2O7(OH)2·(H2O) | |||
| Molecular Weight = 417.69 gm | |||
| Strontium 20.98 % Sr 24.81 % SrO | |||
| Manganese 26.31 % Mn 37.80 % Mn2O3 | |||
| Silicon 13.45 % Si 28.77 % SiO2 | |||
| Hydrogen 0.97 % H 8.63 % H2O | |||
| Oxygen 38.30 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| SrMn3+2Si2O7(OH)2·(H2O) | |||
| Overgrowing sugilite in serandite-pectolite rock. Isotructural with lawsonite. | |||
| Approved IMA 1993 | |||
| Wessels mine, Kalahari manganese field, South Africa. Link to MinDat.org Location Data. | |||
| Named for Henno Martin, German geologist who escaped to South Africa from Nazi Germany. | |||
| ICSD 83667 | |||
| IMA1992-033 | |||
Hennomartinite Image | |||
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Hennomartinite Crystallography |
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| a:b:c =0.6923:1:1.4829 | |||
| a = 6.255, b = 9.034, c = 13.397, Z = 4; V = 757.03 Den(Calc)= 3.66 | |||
| Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: C mcm | |||
| By Intensity(I/Io): 2.833(1), 4.804(0.86), 2.807(0.82), | |||
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Physical Properties of Hennomartinite |
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| None | |||
| Brown, Yellow brown. | |||
| Translucent | |||
| 4 - Fluorite | |||
| Vitreous (Glassy) | |||
| yellowish brown | |||
Optical Properties of Hennomartinite |
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| CI calc= 0.062 (Fair) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.224,KC= 0.2389 |
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| Biaxial (+/-), a=1.82, 2V(Meas)=63. | |||
Calculated Properties of Hennomartinite |
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relectron=3.50 gm/cc |
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| Fermion Index = 0.02114 Boson Index = 0.97886 |
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PEHennomartinite = 30.50 barns/electron |
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| GRapi = 0 (Gamma Ray American Petroleum Institute Units) Hennomartinite is Not Radioactive |
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Hennomartinite Classification |
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| 56.2.3.2 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O | |||
| (56.2)with cations in [4] and/or >[4] coordination | |||
| (56.2.3)Lawsonite - Ilvaite group | |||
| VIII/C.10-15 VIII - Silicates | |||
| VIII/C - Sorosilicates with [Si2O7]6-, with anions unfamiliar to tetraheders [O,OH,F] | |||
| VIII/C.10 - Lawsonite - Ilvaite series | |||
Other Hennomartinite Information |
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| NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.79,p763,1994) OPTIC PROP.(Am.Min.,Vol.79,p763,1994) | |||
| Links to other databases for Hennomartinite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris Search for Hennomartinite using: Visit our Advertisers for Hennomartinite : Translate Hennomartinite Mineral Data : Ask about Hennomartinite here : Print or Cut-and-Paste your Hennomartinite Specimen Label here :
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