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General Manganogrunerite Information |
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 Chemical Formula: |
[ ]Mn2Fe++5Si8O22(OH) | ||
| Composition: |
Molecular Weight = 999.80 gm | ||
| Manganese 10.99 % Mn 14.19 % MnO | |||
| Iron 27.93 % Fe 35.93 % FeO | |||
| Silicon 22.47 % Si 48.08 % SiO2 | |||
| Hydrogen 0.20 % H 1.80 % H2O | |||
| Oxygen 38.41 % O | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Mn2+2Fe2+5(Si8O22)(OH)2 | ||
| Environment: |
Contact metamorphism of manganese rocks. Forms a series with manganocummintonite (tirolite). | ||
| IMA Status: |
Renamed IMA 1997, Formerly Dannemorite 1855 | ||
| Locality: |
Dannemora, Uppsala, Sweden. Link to MinDat.org Location Data. | ||
| Name Origin: |
Renamed IMA 1997 as the Mn analog of grunerite, Formerly dannemorite (1855) which was named after its locality. | ||
| Name Pronunciation: |
Manganogrunerite  |
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| Synonym: |
Dannemorite - Renamed | ||
Manganogrunerite Image | |||
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Images:
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Manganogrunerite Crystallography |
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| Axial Ratios: |
a:b:c =0.535:1:0.2944 | ||
| Cell Dimensions: |
a = 9.606, b = 17.953, c = 5.287, Z = 2; beta = 104.3° V = 883.53 Den(Calc)= 3.76 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m | ||
| X Ray Diffraction: |
By Intensity(I/Io): 8.36(1), 3.09(0.9), 2.76(0.4),3.28(0.4), 2.2(0.2), 2.52(0.2), 2.63(0.2), 3.45(0.2), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Manganogrunerite |
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| Cleavage: |
{110} Perfect, {???} Imperfect | ||
| Color: |
Brown, Gray green, Yellow green, Dark green. | ||
| Density: |
3.1 - 3.4, Average = 3.25 | ||
| Diaphaneity: |
Translucent to subtranslucent to opaque | ||
| Fracture: |
Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. | ||
| Habit: |
Massive - Fibrous - Distinctly fibrous fine-grained forms. | ||
| Habit: |
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite) | ||
| Hardness: |
5-6 - Between Apatite and Orthoclase | ||
| Luster: |
Vitreous - Silky | ||
| Streak: |
white | ||
Optical Properties of Manganogrunerite |
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| Gladstone-Dale: |
CI meas= 0.006 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.141 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1732,KPDmeas= 0.2004,KC= 0.2016 Ncalc = 1.63 - 1.76 |
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| Optical Data: |
Biaxial (+/-), a=1.638, b=1.651, g=1.665, bire=0.0270 | ||
Calculated Properties of Manganogrunerite |
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| Electron Density: |
Bulk Density (Electron Density)=3.16 gm/cc note: Specific Gravity of Manganogrunerite =3.25 gm/cc. |
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| Fermion Index: |
Fermion Index = 0.01 Boson Index = 0.99 |
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| Photoelectric: |
PEManganogrunerite = 12.02 barns/electron U=PEManganogrunerite x rElectron Density= 37.98 barns/cc. |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Manganogrunerite is Not Radioactive |
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Manganogrunerite Classification |
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| Dana Class: |
66.01.01.05 (66)Inosilicate Double-Width Unbranched Chains, W=2 | ||
| (66.01)with P=2 amphibole configuration | |||
| (66.01.01)Group 1, the Mg-Fe-Mn-Li amphiboles (Monoclinic) | |||
| Strunz Class: |
09.DE.05 09 - SILICATES (Germanates) | ||
| 09.D - Inosilicates* Structural terminology according to Liebau (1985) | |||
| 09.DE -Inosilicates with 2-periodic double chains, Si4O11; amphibole family | |||
Other Manganogrunerite Information |
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| References: |
PHYS. PROP.(Min.Mag.,Vol.61,p303,1997) OPTIC PROP.(Dana8) | ||
| See Also: |
Links to other databases for Manganogrunerite : 1 - Am. Min. Crystal Structure Database 2 - Athena 3 - GeoScienceWorld 4 - Google Images 5 - Google Scholar 6 - Handbook of Mineralogy (MinSocAm) 7 - MinDAT 8 - Mineralienatlas (Deutsch) 9 - Online Mineral Museum 10 - QUT Mineral Atlas 11 - Ruff.Info Search for Manganogrunerite using: Visit our Advertisers for Manganogrunerite : A Bijoux Google Search for ManganogruneriteAdam's Minerals Google Search for Manganogrunerite Cape Minerals Google Search for Manganogrunerite Dakota Matrix Minerals Google Search for Manganogrunerite Excalibur Mineral Corp. Google Search for Manganogrunerite Exceptional Minerals Google Search for Manganogrunerite John Betts Fine Minerals Search for Manganogrunerite McDougall Minerals Google Search for Manganogrunerite Mineral News Website Link Rock and Mineral Shows Google Search for Manganogrunerite Weinrich Minerals, Inc. Google Search for Manganogrunerite Ask about Manganogrunerite here : Print or Cut-and-Paste your Manganogrunerite Specimen Label here :
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