Orthochamosite Mineral Data + Say ORTHOCHAMOSITE

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General Orthochamosite Information

Help on Chemical  Formula: Chemical Formula: (Fe++,Mg,Fe+++)5Al(Si3Al)O10(OH,O)8
Help on Composition: Composition: Molecular Weight = 664.18 gm
   Magnesium   5.49 %  Mg    9.10 % MgO
   Aluminum    8.12 %  Al   15.35 % Al2O3
   Iron       29.43 %  Fe   32.45 % FeO /  6.01 % Fe2O3
   Silicon    12.69 %  Si   27.14 % SiO2
   Hydrogen    0.91 %  H     8.14 % H2O
   Oxygen     43.36 %  O
             ______        ______ 
             100.00 %       98.19 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+3Mg1.5Fe3+0.5Al2Si3O12(OH)6
Help on Environment: Environment: In a lateritic clay derived from the alteration of olivine basalts (Ayrshire, Scotland).
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1957 (Dana # Added)
Help on Locality: Locality: Kank, Kutna Hora, Stredocesky kraj, Cechy (Bohemia), Czech Republic. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the orthorhombic analogue of chamosite.
 

Orthochamosite Image

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Orthochamosite

Comments: Pale green micaceous orthochamosite in quartz.
Location: Near Manggruvan, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Orthochamosite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5762:1:0.7578
Help on Cell Dimensions: Cell Dimensions: a = 5.355, b = 9.293, c = 7.043, Z = 1; V = 350.49 Den(Calc)= 3.15
Help on Crystal System: Crystal System: OrthorhombicSpace Group: C3m-pseudoHEX
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.513(1), 7.04(1), 2.514(0.9),1.552(0.7), 2.137(0.6), 1.765(0.4), 2.673(0.4),
 

Physical Properties of Orthochamosite

Help on Cleavage: Cleavage: [001] Perfect
Help on Color: Color: Green, Greenish gray.
Help on Density: Density: 3.1 - 3.15, Average = 3.12
Help on Diaphaniety: Diaphaniety: Translucent
Help on Fracture: Fracture: Micaceous - Fracture of flexable micaceous cleavage fragments.
Help on Habit: Habit: Massive - Lamellar - Distinctly foliated fine-grained forms.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Pearly
Help on Streak: Streak: greenish white
 

Optical Properties of Orthochamosite

Help on Optical Data: Optical Data: Biaxial (-), a=1.6, b=1.6, g=1.67, bire=0.0700, 2V(Calc)=0, 2V(Meas)=0-15.
 

Calculated Properties of Orthochamosite

Help on Electron Density: Electron Density:

relectron=3.10 gm/cc
note: rOrthochamosite =3.15 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.01786
Boson Index = 0.98214
Help on Photoelectric: Photoelectric:

PEOrthochamosite = 9.57 barns/electron
U=PEOrthochamosite x relectron= 29.69 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Orthochamosite is Not Radioactive

 

Orthochamosite Classification

Help on  Dana Class: Dana Class: 71.4.1.9 (71)Phyllosilicate Sheets of Six-Membered Rings
  (71.4)interlayered 1:1, 2:1, and octahedra
  (71.4.1)Chlorite group (Tri-Dioctahedral)
 
71.4.1.1 Donbassite Al2[Al2.33][Si3AlO10](OH)8 C 2/m 2/m
 
71.4.1.2 Cookeite LiAl4(Si3Al)O10(OH)8 P 21/a 2/m
 
71.4.1.3 Sudoite Mg2(Al,Fe)3Si3AlO10(OH)8 C 2/m 2/m
 
71.4.1.4 Clinochlore (Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m
 
71.4.1.5 Nimite (Ni,Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m
 
71.4.1.6 Baileychlore (Zn,Al,[])3[Fe2Al][Si3AlO10](OH)8 C1,C1 Tri
 
71.4.1.7 Chamosite (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C 2/m 2/m
 
71.4.1.8 Pennantite Mn5Al(Si3Al)O10(OH)8 C 2/m 2/m
 
71.4.1.9 Orthochamosite ! (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C3m-pseudoHEX Ortho
 
71.4.1.10 Borocookeite! Li(13x)Al(4-x)(BSi3)O10(OH,F)8[x=0-0.33] pseudo C 2/m 2/m
Help on  Strunz Class: Strunz Class: VIII/H.23-40 VIII - Silicates
  VIII/H - Phyllosilicates (layered) Mica like with [Si4O10]4- and related groups
  VIII/H.23 - Chlorite group
 
VIII/H.23-10 Sudoite Mg2(Al,Fe)3Si3AlO10(OH)8 C 2/m 2/m
 
VIII/H.23-20 Clinochlore (Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m
 
VIII/H.23-30 Chamosite (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C 2/m 2/m
 
VIII/H.23-40 Orthochamosite (Fe,Mg,Fe)5Al(Si3Al)O10(OH,O)8 C3m-pseudoHEX Ortho
 
VIII/H.23-50 Baileychlore (Zn,Al,[])3[Fe2Al][Si3AlO10](OH)8 C1,C1 Tri
 
VIII/H.23-60 Pennantite Mn5Al(Si3Al)O10(OH)8 C 2/m 2/m
 
VIII/H.23-70 Nimite (Ni,Mg,Fe)5Al(Si3Al)O10(OH)8 C 2/m 2/m
 
VIII/H.23-80 Gonyerite Mn3[Mn3Fe][(Si,Fe)4O10](OH,O)8 pseudo-HEX Ortho
 
VIII/H.23-90 Cookeite LiAl4(Si3Al)O10(OH)8 P 21/a 2/m
 
VIII/H.23-95 Borocookeite! Li(13x)Al(4-x)(BSi3)O10(OH,F)8[x=0-0.33] pseudo C 2/m 2/m
 
VIII/H.23-100 Manandonite Li2Al4[(Si2AlB)O10](OH)8 C1 1
 
VIII/H.23-110 Franklinfurnaceite Ca2(Fe,Al)MnMn3Zn2Si2O10(OH)8 C 2 2
 

Other Orthochamosite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Orthochamosite :
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

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Orthochamosite

(Fe++,Mg,Fe+++)5Al(Si3Al)O10(OH,O)8
Dana No: 71.4.1.9 Strunz No: VIII/H.23-40
Locality:

 

Notes:

 

 
   
 
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