Ferrogedrite Mineral Data + Say FERROGEDRITE

General Ferrogedrite Information
Help on Chemical Formula: Chemical Formula: [ ]Fe++5Al2Si6Al2O22(OH)2
Help on Composition: Composition: Molecular Weight = 941.68 gm
   Aluminum  11.46 %  Al   21.66 % Al2O3
   Iron      29.65 %  Fe   38.15 % FeO
   Silicon   17.90 %  Si   38.28 % SiO2
   Hydrogen   0.21 %  H     1.91 % H2O
   Oxygen    40.78 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+5Al4Si6O22(OH)2
Help on IMA Status: IMA Status: Approved IMA 1978
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, Gedres, France.
 

Search for Ferrogedrite Images

Click Here To Search Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.
  

Ferrogedrite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.0317:1:0.2962
Help on Cell Dimensions: Cell Dimensions: a = 18.51, b = 17.94, c = 5.315, Z = 4; V = 1,764.95 Den(Calc)= 3.54
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P nma
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.23(1), 3.04(0.7), 3.22(0.2),2.51(0.1), 2.58(0.1), 2.68(0.1), 4.63(0.1), 8.95(0.1),
 

Physical Properties of Ferrogedrite

Help on Cleavage: Cleavage: [110] Perfect, [010] Indistinct, [100] Indistinct
Help on Color: Color: Green, Brownish green, Brown, Greenish blue.
Help on Density: Density: 3.57
Help on Diaphaniety: Diaphaniety: Transparent to Subopaque
Help on Hardness: Hardness: 5.5-6 - Knife Blade-Orthoclase
Help on Luster: Luster: Vitreous - Silky
Help on Streak: Streak: gray white
 

Optical Properties of Ferrogedrite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.061 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.053 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.192,KPDmeas= 0.1904,KC= 0.2027
Help on Optical Data: Optical Data: Biaxial (-), a=1.642-1.694, b=1.649-1.71, g=1.661-1.722, bire=0.0190-0.0280, 2V(Calc)=76-80, 2V(Meas)=82.
 

Calculated Properties of Ferrogedrite

Help on Electron Density: Electron Density:

relectron=3.46 gm/cc
note: rFerrogedrite =3.54 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.01483
Boson Index = 0.98517
Help on Photoelectric: Photoelectric:

PEFerrogedrite = 9.86 barns/electron
U=PEFerrogedrite x relectron= 34.09 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Ferrogedrite is Not Radioactive
 

Ferrogedrite Classification
Help on Dana Class: Dana Class: 66.1.2.7 (66)Inosilicate Double-Width Unbranched Chains, W=2
  (66.1)Dana Type
  (66.1.2)Group 1, the Mg-Fe-Mn-Li amphiboles (Orthorhombic)
 
66.1.2.1 Magnesioanthophyllite? (Mg,Fe)7Si8O22(OH)2 P nma 2/m 2/m 2/m
 
66.1.2.2 Anthophyllite []Mg7Si8O22(OH)2 P nma 2/m 2/m 2/m
 
66.1.2.2a Protoanthophyllite! (Mg,Fe)7Si8O22(OH)2 Pnmn 2/m 2/m 2/m
 
66.1.2.3 Ferro-anthophyllite []Fe7Si8O22(OH)2 P nma 2/m 2/m 2/m
 
66.1.2.3a Protoferro-anthophyllite! (Fe,Mn)2(Fe,Mg)5(Si4O11)2(OH)2 Pnmn 2/m 2/m 2/m
 
66.1.2.3b Protomangano-ferro-anthophyllite! (Mn,Fe)2(Fe,Mg)5(Si4O11)2(OH)2 Pnmn 2/m 2/m 2/m
 
66.1.2.4 Sodicanthophyllite NaMg7Si8O22(OH)2 P nma 2/m 2/m 2/m
 
66.1.2.4a Sodic-ferro-anthophyllite! NaFe7Si8O22(OH)2 P nma 2/m 2/m 2/m
 
66.1.2.5 Magnesiogedrite? (Mg,Fe)5Al2Si6Al2O22(OH)2 P nma 2/m 2/m 2/m
 
66.1.2.6 Gedrite []Mg5Al2Si6Al2O22(OH)2 P nma 2/m 2/m 2/m
 
66.1.2.7 Ferrogedrite []Fe5Al2Si6Al2O22(OH)2 P nma 2/m 2/m 2/m
 
66.1.2.7a Sodic-ferrogedrite! NaFe6AlSi6Al2O22(OH)2 P nma 2/m 2/m 2/m
 
66.1.2.8 Sodicgedrite NaMg6AlSi6Al2O22(OH)2 P nma 2/m 2/m 2/m
 
66.1.2.9 Magnesioholmquistite Li2(Mg,Fe)3Al2Si8O22(OH)2 P nma 2/m 2/m 2/m
 
66.1.2.10 Holmquistite [](Li2Mg3Al2)Si8O22(OH)2 P nma 2/m 2/m 2/m
 
66.1.2.11 Ferroholmquistite [](Li2Fe3Al2)Si8O22(OH)2 P nma 2/m 2/m 2/m
 
66.1.2.12 IMA2004-030! []Li2(Fe3Al2)S5(Si8O22)(OH)2 P nma 2/m 2/m 2/m
Help on Strunz Class: Strunz Class: VIII/F.12-110 VIII - Silicates
  VIII/F - Inosilicates (chain and band) double chains [Si4O11]6-, Orthorhombic Amphiboles
  VIII/F.12 - Amphibole group, Magnesioholmquistite - Ferrogedrite series
 
VIII/F.12-10 Magnesioholmquistite Li2(Mg,Fe)3Al2Si8O22(OH)2 P nma 2/m 2/m 2/m
 
VIII/F.12-20 Holmquistite [](Li2Mg3Al2)Si8O22(OH)2 P nma 2/m 2/m 2/m
 
VIII/F.12-30 Ferroholmquistite [](Li2Fe3Al2)Si8O22(OH)2 P nma 2/m 2/m 2/m
 
VIII/F.12-40 Sodicanthophyllite NaMg7Si8O22(OH)2 P nma 2/m 2/m 2/m
 
VIII/F.12-45 Sodic-ferro-anthophyllite! NaFe7Si8O22(OH)2 P nma 2/m 2/m 2/m
 
VIII/F.12-50 Magnesioanthophyllite? (Mg,Fe)7Si8O22(OH)2 P nma 2/m 2/m 2/m
 
VIII/F.12-60 Anthophyllite []Mg7Si8O22(OH)2 P nma 2/m 2/m 2/m
 
VIII/F.12-70 Ferro-anthophyllite []Fe7Si8O22(OH)2 P nma 2/m 2/m 2/m
 
VIII/F.12-75 Sodic-ferrogedrite! NaFe6AlSi6Al2O22(OH)2 P nma 2/m 2/m 2/m
 
VIII/F.12-80 Sodicgedrite NaMg6AlSi6Al2O22(OH)2 P nma 2/m 2/m 2/m
 
VIII/F.12-90 Magnesiogedrite? (Mg,Fe)5Al2Si6Al2O22(OH)2 P nma 2/m 2/m 2/m
 
VIII/F.12-100 Gedrite []Mg5Al2Si6Al2O22(OH)2 P nma 2/m 2/m 2/m
 
VIII/F.12-110 Ferrogedrite []Fe5Al2Si6Al2O22(OH)2 P nma 2/m 2/m 2/m
 
VIII/F.12-130 Protoferro-anthophyllite! (Fe,Mn)2(Fe,Mg)5(Si4O11)2(OH)2 Pnmn 2/m 2/m 2/m
 
VIII/F.12-140* Protoanthophyllite! (Mg,Fe)7Si8O22(OH)2 Pnmn 2/m 2/m 2/m
 
VIII/F.12-140 Protomangano-ferro-anthophyllite! (Mn,Fe)2(Fe,Mg)5(Si4O11)2(OH)2 Pnmn 2/m 2/m 2/m
 

Other Ferrogedrite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Ferrogedrite :
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 -École des Mines de Paris

Search for Ferrogedrite using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Ferrogedrite :
AA Mineral Specimens
A-Rocks Auction
Adams Minerals
B and L Minerals
Dakota Matrix
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Minernet.it
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Ferrogedrite Mineral Data :

Ask about Ferrogedrite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Ferrogedrite

[ ]Fe++5Al2Si6Al2O22(OH)2
Dana No: 66.1.2.7 Strunz No: VIII/F.12-110
Locality:

 

Notes:

 
 
   
 
Go To Webmineral Home Crystallography X-Ray D-Spacing Table Chemical Composition
Dana Classification Strunz Classification Table of Mineral Properties Alphabetical Listing of Minerals
Search Webmineral Photo Gallery of Mineral Images Help Files Links