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Magnesiogedrite Mineral Data

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General Magnesiogedrite Information

Help on Chemical  Formula: Chemical Formula: (Mg,Fe++)5Al2Si6Al2O22(OH)2
Help on Composition: Composition: Molecular Weight = 847.05 gm
   Magnesium   8.61 %  Mg   14.27 % MgO
   Aluminum   12.74 %  Al   24.07 % Al2O3
   Iron       13.19 %  Fe   16.96 % FeO
   Silicon    19.89 %  Si   42.56 % SiO2
   Hydrogen    0.24 %  H     2.13 % H2O
   Oxygen     45.33 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg3Fe2+2Al2(Si6Al2O22)(OH)2
Help on Environment: Environment: IMA amphibole commission recommends abandoning this species name.
Help on IMA Status: IMA Status: Discredited IMA 1998
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its composition and the original gederite location at Heas Valley, Gedres, France.
Help on Synonym: Synonym: Discredited
 

Magnesiogedrite Image

Click Here for Larger   Image in a New Browser Window Images:
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  Gedrite   Magnesiogedrite

Comments: Dark gray cleavage fragment of magnesiogedrite (gedrite).
Location: Bamble, Telemark, Norway. Scale: See Image.
© Rruff Database

Magnesiogedrite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0445:1:0.2958
Help on Cell Dimensions: Cell Dimensions: a = 18.531, b = 17.741, c = 5.249, Z = 4; V = 1,725.65 Den(Calc)= 3.26
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
 

Physical Properties of Magnesiogedrite

Help on Cleavage: Cleavage: {???} Good
Help on Color: Color: Gray white.
Help on Hardness: Hardness: 5-6 - Between Apatite and Orthoclase
Help on Streak: Streak: white
 

Optical Properties of Magnesiogedrite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.071 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1914,KC= 0.206
Ncalc = 1.67
Help on Optical Data: Optical Data: Biaxial (-), a=1.613, b=1.625, g=1.634, bire=0.0210
Help on Pleochroism (x): Pleochroism (x): none.
Help on Pleochroism (y): Pleochroism (y): none.
Help on Pleochroism (z): Pleochroism (z): none.
 

Calculated Properties of Magnesiogedrite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.22 gm/cc
note: Specific Gravity of Magnesiogedrite =3.26 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEMagnesiogedrite = 5.22 barns/electron
U=PEMagnesiogedrite x rElectron Density= 16.80 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Magnesiogedrite is Not Radioactive
 

Magnesiogedrite Classification

Help on  Dana Class: Dana Class: 66.01.02.05 (66)Inosilicate Double-Width Unbranched Chains, W=2
  (66.01)with P=2 amphibole configuration
  (66.01.02)Dana Group
 
66.01.02.01 Magnesioanthophyllite? (Mg,Fe)7Si8O22(OH)2 P nma 2/m 2/m 2/m
 
66.01.02.02 Anthophyllite []Mg7Si8O22(OH)2 P nma 2/m 2/m 2/m
 
66.01.02.02a Protoanthophyllite! (Mg,Fe)7Si8O22(OH)2 Pnmn 2/m 2/m 2/m
 
66.01.02.03 Ferro-anthophyllite []Fe7Si8O22(OH)2 P nma 2/m 2/m 2/m
 
66.01.02.03a Protoferro-anthophyllite! (Fe,Mn)2(Fe,Mg)5(Si4O11)2(OH)2 Pnmn 2/m 2/m 2/m
 
66.01.02.03b Protomangano-ferro-anthophyllite! (Mn,Fe)2(Fe,Mg)5(Si4O11)2(OH)2 Pnmn 2/m 2/m 2/m
 
66.01.02.04 Sodicanthophyllite NaMg7Si8O22(OH)2 P nma 2/m 2/m 2/m
 
66.01.02.04a Sodic-ferro-anthophyllite! NaFe7Si8O22(OH)2 P nma 2/m 2/m 2/m
 
66.01.02.05 Magnesiogedrite? (Mg,Fe)5Al2Si6Al2O22(OH)2 P nma 2/m 2/m 2/m
 
66.01.02.06 Gedrite []Mg5Al2Si6Al2O22(OH)2 P nma 2/m 2/m 2/m
 
66.01.02.07 Ferrogedrite []Fe5Al2Si6Al2O22(OH)2 P nma 2/m 2/m 2/m
 
66.01.02.07a Sodic-ferrogedrite! NaFe6AlSi6Al2O22(OH)2 P nma 2/m 2/m 2/m
 
66.01.02.08 Sodicgedrite NaMg6AlSi6Al2O22(OH)2 P nma 2/m 2/m 2/m
 
66.01.02.09 Magnesioholmquistite Li2(Mg,Fe)3Al2Si8O22(OH)2 P nma 2/m 2/m 2/m
 
66.01.02.10 Holmquistite [](Li2Mg3Al2)Si8O22(OH)2 P nma 2/m 2/m 2/m
 
66.01.02.11 Ferroholmquistite [](Li2Fe3Al2)Si8O22(OH)2 P nma 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.DD.05 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DD -Inosilicates with 2-periodic double chains, Si4O11; amphibole family
 
09.DD.05 Ferri-clinoholmquistite! []Li2Mg3(Fe3)2(Si8O22)(OH)2 C 2/m 2/m
 
09.DD.05 Clinoholmquistite? [](Li2Mg3Al2)Si8O22(OH)2 C 2/m 2/m
 
09.DD.05 Magnesiogedrite? (Mg,Fe)5Al2Si6Al2O22(OH)2 P nma 2/m 2/m 2/m
 
09.DD.05 Magnesioholmquistite Li2(Mg,Fe)3Al2Si8O22(OH)2 P nma 2/m 2/m 2/m
 
09.DD.05 Magnesioclinoholmquistite? Li2(Mg,Fe)3Al2Si8O22(OH)2 C 2/m 2/m
 

Other Magnesiogedrite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Magnesiogedrite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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

Magnesiogedrite

(Mg,Fe++)5Al2Si6Al2O22(OH)2
Dana No: 66.01.02.05 Strunz No: 09.DD.05
Locality:

 

Notes:

 

 
   
 


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