General Manganogrunerite Information
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Chemical Formula: |
[ ]Mn2Fe++5Si8O22(OH) |
Composition: |
Molecular Weight = 999.80 gm |
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Manganese 10.99 % Mn 14.19 % MnO |
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Iron 27.93 % Fe 35.93 % FeO |
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Silicon 22.47 % Si 48.08 % SiO2 |
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Hydrogen 0.20 % H 1.80 % H2O |
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Oxygen 38.41 % O |
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______ ______ |
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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. |
Synonym: |
Dannemorite - Renamed |
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Manganogrunerite Image |
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), |
Crystal Structure:
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Reece J J , Redfern S A T , Welch M D , Henderson C M B , McCammon C A , Physics and Chemistry of Minerals , 29 (2002) p.562-570, Temperature-dependent Fe-Mn order-disorder behaviour in amphiboles, Sample: BM40798, T = 25 C, Locality: Langban, Sweden
View Additional jPOWD Structure files for Manganogrunerite
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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 |
Diaphaniety: |
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 |
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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 |
Optical Data: |
Biaxial (+/-), a=1.638, b=1.651, g=1.665, bire=0.0270 |
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Calculated Properties of Manganogrunerite
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Electron Density: |
relectron=3.16 gm/cc note: rManganogrunerite =3.25 gm/cc. |
Fermion Index |
Fermion Index = 0.0166 Boson Index = 0.9834 |
Photoelectric: |
PEManganogrunerite = 12.02 barns/electron U=PEManganogrunerite x relectron= 37.98 barns/cc. |
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: |
66.1.1.5 (66)Inosilicate Double-Width Unbranched Chains, W=2 |
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(66.1)Dana Type |
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(66.1.1)Group 1, the Mg-Fe-Mn-Li amphiboles (Monoclinic) |
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66.1.1.1 Magnesiocummingtonite (Mg,Fe)7Si8O22(OH)2 C 2/m 2/m |
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66.1.1.2 Cummingtonite []Mg7Si8O22(OH)2 C 2/m 2/m |
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66.1.1.3 Grunerite []Fe7Si8O22(OH)2 C 2/m 2/m |
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66.1.1.3b Permanganogrunerite! []Mn4(Fe)3(Si8O22)(OH)2 C 2/m 2/m |
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66.1.1.4 Manganocummingtonite Na(Na,Mn)2(Mg4,Fe)5Si8O22(OH)2 C 2/m 2/m |
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66.1.1.5 Manganogrunerite []Mn2Fe5Si8O22(OH) C 2/m 2/m |
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66.1.1.6 Magnesioclinoholmquistite? Li2(Mg,Fe)3Al2Si8O22(OH)2 C 2/m 2/m |
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66.1.1.7 Clinoholmquistite? [](Li2Mg3Al2)Si8O22(OH)2 C 2/m 2/m |
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66.1.1.8 Clinoferroholmquistite [](Li2Fe3Al2)Si8O22(OH)2 C 2/m 2/m |
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66.1.1.8a Ferri-clinoholmquistite! []Li2Mg3(Fe3)2(Si8O22)(OH)2 C 2/m 2/m |
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66.1.1.8b Ferri-clinoferroholmquistite! []Li2(Fe2Fe3)Si8O22(OH)2 C 2/m 2/m |
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66.1.1.9 Sodic-ferripedrizite! Na(LiNa)(Fe2Mg2Li)Si8O22(OH,F)2 C 2/m 2/m |
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66.1.1.9a Ferripedrizite! NaLi2(Fe2Mg2Li)Si8O22(OH)2 C 2/m 2/m |
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66.1.1.9b Sodic-ferri-ferropedrizite! NaLi2(Fe2Fe3)Si8O22(OH)2 C 2/m 2/m |
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66.1.1.9c Fluoro-sodic-pedrizite! NaLi2(Mg2Al2Li)S5Si8O22F2 C 2/m 2/m |
Strunz Class: |
VIII/F.07-50 VIII - Silicates |
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VIII/F - Inosilicates (chain and band) double chains [Si4O11]6- , Mg-Fe-Mn-Amphiboles |
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VIII/F.07 - Amphibole group, Magnesiocummingtonite - Ferroclinoholmquistite series |
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VIII/F.07-10 Magnesiocummingtonite (Mg,Fe)7Si8O22(OH)2 C 2/m 2/m |
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VIII/F.07-20 Cummingtonite []Mg7Si8O22(OH)2 C 2/m 2/m |
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VIII/F.07-30 Grunerite []Fe7Si8O22(OH)2 C 2/m 2/m |
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VIII/F.07-40 Manganocummingtonite Na(Na,Mn)2(Mg4,Fe)5Si8O22(OH)2 C 2/m 2/m |
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VIII/F.07-50 Manganogrunerite []Mn2Fe5Si8O22(OH) C 2/m 2/m |
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VIII/F.07-55 Permanganogrunerite! []Mn4(Fe)3(Si8O22)(OH)2 C 2/m 2/m |
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VIII/F.07-60 Magnesioclinoholmquistite? Li2(Mg,Fe)3Al2Si8O22(OH)2 C 2/m 2/m |
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VIII/F.07-70 Clinoholmquistite? [](Li2Mg3Al2)Si8O22(OH)2 C 2/m 2/m |
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VIII/F.07-80 Clinoferroholmquistite [](Li2Fe3Al2)Si8O22(OH)2 C 2/m 2/m |
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VIII/F.07-90 Ferri-clinoferroholmquistite! []Li2(Fe2Fe3)Si8O22(OH)2 C 2/m 2/m |
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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 -Google Images
4 -Google Scholar
5 -MinDAT
6 -MinMax(Deutsch)
7 -MinMax(English)
8 -Mineralienatlas (Deutsch)
9 -QUT Mineral Atlas
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Manganogrunerite
[ ]Mn2Fe++5Si8O22(OH)
Dana No: 66.1.1.5 Strunz No: VIII/F.07-50
Locality:
Notes:
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