Manganogrunerite Mineral Data

Manganogrunerite Mineral Data +

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General Manganogrunerite Information

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.

Synonym:

Dannemorite - Renamed

Manganogrunerite Image

Images:

Manganogrunerite

Comments: Brown fibrous massive, iron stained manganogrunerite.
Location: Hallefors, Orebro, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Manganogrunerite Crystallography

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

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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
[1] [10] [11] [2] [3] [4] [5] [6] [7] [8] [9]

Physical Properties of Manganogrunerite

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

Optical Properties of Manganogrunerite

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

Calculated Properties of Manganogrunerite

Electron Density:

r_electron=3.16 gm/cc
note: r_{Manganogrunerite}=3.25 gm/cc.

Fermion Index

Fermion Index = 0.0166
Boson Index = 0.9834

Photoelectric:

PE_{Manganogrunerite}= 12.02 barns/electron
U=PE_{Manganogrunerite} x r_electron= 37.98 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Manganogrunerite is Not Radioactive

Manganogrunerite Classification

Dana Class:

66.1.1.5 (66)Inosilicate Double-Width Unbranched Chains, W=2

(66.1)Dana Type

(66.1.1)Group 1, the Mg-Fe-Mn-Li amphiboles (Monoclinic)

66.1.1.1 Magnesiocummingtonite (Mg,Fe)7Si8O22(OH)2 C 2/m 2/m

66.1.1.2 Cummingtonite []Mg7Si8O22(OH)2 C 2/m 2/m

66.1.1.3 Grunerite []Fe7Si8O22(OH)2 C 2/m 2/m

66.1.1.3b Permanganogrunerite! []Mn4(Fe)3(Si8O22)(OH)2 C 2/m 2/m

66.1.1.4 Manganocummingtonite Na(Na,Mn)2(Mg4,Fe)5Si8O22(OH)2 C 2/m 2/m

66.1.1.5 Manganogrunerite []Mn2Fe5Si8O22(OH) C 2/m 2/m

66.1.1.6 Magnesioclinoholmquistite? Li2(Mg,Fe)3Al2Si8O22(OH)2 C 2/m 2/m

66.1.1.7 Clinoholmquistite? [](Li2Mg3Al2)Si8O22(OH)2 C 2/m 2/m

66.1.1.8 Clinoferroholmquistite [](Li2Fe3Al2)Si8O22(OH)2 C 2/m 2/m

66.1.1.8a Ferri-clinoholmquistite! []Li2Mg3(Fe3)2(Si8O22)(OH)2 C 2/m 2/m

66.1.1.8b Ferri-clinoferroholmquistite! []Li2(Fe2Fe3)Si8O22(OH)2 C 2/m 2/m

66.1.1.9 Sodic-ferripedrizite! Na(LiNa)(Fe2Mg2Li)Si8O22(OH,F)2 C 2/m 2/m

66.1.1.9a Ferripedrizite! NaLi2(Fe2Mg2Li)Si8O22(OH)2 C 2/m 2/m

66.1.1.9b Sodic-ferri-ferropedrizite! NaLi2(Fe2Fe3)Si8O22(OH)2 C 2/m 2/m

66.1.1.9c Fluoro-sodic-pedrizite! NaLi2(Mg2Al2Li)S5Si8O22F2 C 2/m 2/m

Strunz Class:

VIII/F.07-50 VIII - Silicates

VIII/F - Inosilicates (chain and band) double chains [Si4O11]6- , Mg-Fe-Mn-Amphiboles

VIII/F.07 - Amphibole group, Magnesiocummingtonite - Ferroclinoholmquistite series

VIII/F.07-10 Magnesiocummingtonite (Mg,Fe)7Si8O22(OH)2 C 2/m 2/m

VIII/F.07-20 Cummingtonite []Mg7Si8O22(OH)2 C 2/m 2/m

VIII/F.07-30 Grunerite []Fe7Si8O22(OH)2 C 2/m 2/m

VIII/F.07-40 Manganocummingtonite Na(Na,Mn)2(Mg4,Fe)5Si8O22(OH)2 C 2/m 2/m

VIII/F.07-50 Manganogrunerite []Mn2Fe5Si8O22(OH) C 2/m 2/m

VIII/F.07-55 Permanganogrunerite! []Mn4(Fe)3(Si8O22)(OH)2 C 2/m 2/m

VIII/F.07-60 Magnesioclinoholmquistite? Li2(Mg,Fe)3Al2Si8O22(OH)2 C 2/m 2/m

VIII/F.07-70 Clinoholmquistite? [](Li2Mg3Al2)Si8O22(OH)2 C 2/m 2/m

VIII/F.07-80 Clinoferroholmquistite [](Li2Fe3Al2)Si8O22(OH)2 C 2/m 2/m

VIII/F.07-90 Ferri-clinoferroholmquistite! []Li2(Fe2Fe3)Si8O22(OH)2 C 2/m 2/m

Other Manganogrunerite Information

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 - Handbook of Mineralogy (MinSocAm)
6 - MinDAT
7 - MinMax(Deutsch)
8 - MinMax(English)
9 - Mineralienatlas (Deutsch)
10 - QUT Mineral Atlas
11 - Ruff.Info

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Print or Cut-and-Paste your Manganogrunerite Specimen Label here :

Manganogrunerite

[ ]Mn2Fe++5Si8O22(OH)
Dana No: 66.1.1.5 Strunz No: VIII/F.07-50
Locality:

Notes: