Glaucophane Mineral Data + Say GLAUCOPHANE

General Glaucophane Information
Help on Chemical Formula: Chemical Formula: [ ]Na2(Mg3Al2)Si8O22(OH)2
Help on Composition: Composition: Molecular Weight = 783.54 gm
   Sodium      5.87 %  Na    7.91 % Na2O
   Magnesium   9.31 %  Mg   15.43 % MgO
   Aluminum    6.89 %  Al   13.01 % Al2O3
   Silicon    28.68 %  Si   61.35 % SiO2
   Hydrogen    0.26 %  H     2.30 % H2O
   Oxygen     49.01 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na2Mg3Al2(Si8O22)(OH)2
Help on Environment: Environment: Metamorphic blue shists.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1845
Help on Locality: Locality: Common world wide. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek glaukos - "blue" and fanos - "appearing."
Help on Synonym: Synonym: ICSD 24433
  PDF 20-453
 

Glaucophane Image

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Glaucophane

Comments: Pale violet to gray fibrous massive glaucophane.
Location: Lac Malartic, Quebec, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Glaucophane Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.5378:1:0.2984
Help on Cell Dimensions: Cell Dimensions: a = 9.541, b = 17.74, c = 5.295, Z = 2; beta = 103.67° V = 870.83 Den(Calc)= 2.99
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.714(1), 3.12(0.9), 2.502(0.8),
Click Here for Large Glaucophane Structure Window Crystal Structure:

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Papike J J , Clark J R , American Mineralogist , 53 (1968) p.1156-1173, The crystal structure and cation distribution of glaucophane

View Additional jPOWD Structure files for Glaucophane
[1] [2] [3]
 

Physical Properties of Glaucophane

Help on Cleavage: Cleavage: [110] Good, [001] Good
Help on Color: Color: Gray, Bluish black, Lavender blue, Azure blue.
Help on Density: Density: 3 - 3.15, Average = 3.07
Help on Diaphaniety: Diaphaniety: Translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Columnar - Forms columns
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Habit: Habit: Massive - Fibrous - Distinctly fibrous fine-grained forms.
Help on Hardness: Hardness: 6-6.5 - Orthoclase-Pyrite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: grayish blue
 

Optical Properties of Glaucophane

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.014 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2113,KPDmeas= 0.2054,KC= 0.2082
Help on Optical Data: Optical Data: Biaxial (-), a=1.606-1.637, b=1.615-1.65, g=1.627-1.655, bire=0.0180-0.0210, 2V(Calc)=62-84, 2V(Meas)=10-80. Dispersion strong, r < v.
Help on Pleochroism (x): Pleochroism (x): light yellowish violet, wine yellow, yellowish green, pale yellow, or colorless.
Help on Pleochroism (y): Pleochroism (y): light violet, violet, brownish green, bluish green, or reddish violet.
Help on Pleochroism (z): Pleochroism (z): light prussian blue, dark blue, greenish blue, green deep bluish, or azure blue.
 

Calculated Properties of Glaucophane

Help on Electron Density: Electron Density:

relectron=2.98 gm/cc
note: rGlaucophane =2.99 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.02293
Boson Index = 0.97707
Help on Photoelectric: Photoelectric:

PEGlaucophane = 1.61 barns/electron
U=PEGlaucophane x relectron= 4.78 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Glaucophane is Not Radioactive
 

Glaucophane Classification
Help on Dana Class: Dana Class: 66.1.3c.1 (66)Inosilicate Double-Width Unbranched Chains, W=2
  (66.1)Dana Type
  (66.1.3c)Group 4, the sodic amphiboles
 
66.1.3c.1 Glaucophane []Na2(Mg3Al2)Si8O22(OH)2 C 2/m 2/m
 
66.1.3c.2 Ferroglaucophane []Na2(Fe3Al2)Si8O22(OH)2 C 2/m 2/m
 
66.1.3c.3 Crossite? Na2(Mg,Fe)3(Al,Fe)2Si8O22(OH)2 C 2/m 2/m
 
66.1.3c.4 Magnesioriebeckite []Na2(Mg3Fe2)Si8O22(OH)2 C 2/m 2/m
 
66.1.3c.5 Riebeckite []Na2(Fe3Fe2)Si8O22(OH)2 C 2/m 2/m
 
66.1.3c.6 Eckermannite NaNa2(Mg4Al)Si8O22(OH)2 C 2/m 2/m
 
66.1.3c.7 Ferro-eckermannite NaNa2(Fe4Al)Si8O22(OH)2 C 2/m 2/m
 
66.1.3c.8 Magnesio-arfvedsonite NaNa2(Mg4Fe)Si8O22(OH)2 C 2/m 2/m
 
66.1.3c.9 Arfvedsonite NaNa2(Fe4Fe)Si8O22(OH)2 C 2/m 2/m
 
66.1.3c.9a Fluoro-magnesio-arfvedsonite! NaNa2(Mg,Fe)4Fe[Si8O22](F,OH)2 C 2/m 2/m
 
66.1.3c.9b Potassicarfvedsonite! KNa2Fe4FeSi8O22(OH)2 C 2/m 2/m
 
66.1.3c.10 Kozulite NaNa2Mn4(Fe,Al)Si8O22(OH)2 C 2/m 2/m
 
66.1.3c.11 Nyboite NaNa2(Mg3Al2)Si7AlO22(OH)2 C 2/m 2/m
 
66.1.3c.11a Ferronyboite! NaNa2(Fe)3Al2(Si7Al)O22(OH)2 C 2/m 2/m
 
66.1.3c.11b Ferric-ferronyboite! NaNa2(Fe)3(Fe)2(Si7Al)O22(OH)2 C 2/m 2/m
 
66.1.3c.11c Fluoronyboite! NaNa2(Al2Mg3)(Si7Al)O22(F,OH)2 C 2/m 2/m
 
66.1.3c.12 Leakeite NaNa2(Mg2Fe2Li)Si8O22(OH)2 C 2/m 2/m
 
66.1.3c.12a Ferroleakeite! NaNa2(Fe)3(Fe)2Li(Si8O22)(OH)2 C 2/m 2/m
 
66.1.3c.12b Potassicleakeite! KNa2Mg2Fe2LiSi8O22(OH)2 C 2/m 2/m
 
66.1.3c.13 Kornite Na(CaNa)Fe4(Al,Fe)Si7AlO22(OH)2 C 2/m 2/m
 
66.1.3c.14 Ungarettiite NaNa2(Mn2Mn3)Si8O22O2 C 2/m 2/m
 
66.1.3c.15 Fluoro-ferroleakeite NaNa2(Fe2Fe2Li)Si8O22F2 C 2/m 2/m
 
66.1.3c.16 Obertiite! NaNa2(Mg3FeTi)Si8O22(O,F,OH)2 C 2/m 2/m
 
66.1.3c.17 Dellaventuraite! NaNa2(Mg2,Mn,Li,Ti)Si8O22O2 C 2/m 2/m
Help on Strunz Class: Strunz Class: VIII/F.08-10 VIII - Silicates
  VIII/F - Inosilicates (chain and band) double chains [Si4O11]6-, Alkali-Amphiboles
  VIII/F.08 - Amphibole group, Glaucophane - Riebeckite - Kozulite series
 
VIII/F.08-10 Glaucophane []Na2(Mg3Al2)Si8O22(OH)2 C 2/m 2/m
 
VIII/F.08-20 Ferroglaucophane []Na2(Fe3Al2)Si8O22(OH)2 C 2/m 2/m
 
VIII/F.08-30 Crossite? Na2(Mg,Fe)3(Al,Fe)2Si8O22(OH)2 C 2/m 2/m
 
VIII/F.08-40 Magnesioriebeckite []Na2(Mg3Fe2)Si8O22(OH)2 C 2/m 2/m
 
VIII/F.08-50 Riebeckite []Na2(Fe3Fe2)Si8O22(OH)2 C 2/m 2/m
 
VIII/F.08-56 Fluoronyboite! NaNa2(Al2Mg3)(Si7Al)O22(F,OH)2 C 2/m 2/m
 
VIII/F.08-60 Nyboite NaNa2(Mg3Al2)Si7AlO22(OH)2 C 2/m 2/m
 
VIII/F.08-65 Ferronyboite! NaNa2(Fe)3Al2(Si7Al)O22(OH)2 C 2/m 2/m
 
VIII/F.08-67 Ferric-ferronyboite! NaNa2(Fe)3(Fe)2(Si7Al)O22(OH)2 C 2/m 2/m
 
VIII/F.08-70 Eckermannite NaNa2(Mg4Al)Si8O22(OH)2 C 2/m 2/m
 
VIII/F.08-80 Ferro-eckermannite NaNa2(Fe4Al)Si8O22(OH)2 C 2/m 2/m
 
VIII/F.08-81 Ferripedrizite! NaLi2(Fe2Mg2Li)Si8O22(OH)2 C 2/m 2/m
 
VIII/F.08-83 Sodic-ferripedrizite! Na(LiNa)(Fe2Mg2Li)Si8O22(OH,F)2 C 2/m 2/m
 
VIII/F.08-84 Ferroleakeite! NaNa2(Fe)3(Fe)2Li(Si8O22)(OH)2 C 2/m 2/m
 
VIII/F.08-85 Leakeite NaNa2(Mg2Fe2Li)Si8O22(OH)2 C 2/m 2/m
 
VIII/F.08-86 Fluoro-ferroleakeite NaNa2(Fe2Fe2Li)Si8O22F2 C 2/m 2/m
 
VIII/F.08-87 Kornite Na(CaNa)Fe4(Al,Fe)Si7AlO22(OH)2 C 2/m 2/m
 
VIII/F.08-88 Ungarettiite NaNa2(Mn2Mn3)Si8O22O2 C 2/m 2/m
 
VIII/F.08-89 Obertiite! NaNa2(Mg3FeTi)Si8O22(O,F,OH)2 C 2/m 2/m
 
VIII/F.08-90 Magnesio-arfvedsonite NaNa2(Mg4Fe)Si8O22(OH)2 C 2/m 2/m
 
VIII/F.08-92 Fluoro-magnesio-arfvedsonite! NaNa2(Mg,Fe)4Fe[Si8O22](F,OH)2 C 2/m 2/m
 
VIII/F.08-95 Sodic-ferri-ferropedrizite! NaLi2(Fe2Fe3)Si8O22(OH)2 C 2/m 2/m
 
VIII/F.08-100 Arfvedsonite NaNa2(Fe4Fe)Si8O22(OH)2 C 2/m 2/m
 
VIII/F.08-105 Ferriwhittakerite! Na(NaLi)(Mg2Fe2Li)Si8O22(OH)2 C 2/m 2/m
 
VIII/F.08-110 Kozulite NaNa2Mn4(Fe,Al)Si8O22(OH)2 C 2/m 2/m
 
VIII/F.08-112 Potassicleakeite! KNa2Mg2Fe2LiSi8O22(OH)2 C 2/m 2/m
 
VIII/F.08-125 Dellaventuraite! NaNa2(Mg2,Mn,Li,Ti)Si8O22O2 C 2/m 2/m
 
VIII/F.08-157 Potassicarfvedsonite! KNa2Fe4FeSi8O22(OH)2 C 2/m 2/m
 

Other Glaucophane Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Heinrich65)
Help on See Also: See Also: Links to other databases for Glaucophane :
1 -Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Applied Mineralogy 4 -Athena 5 - Crocoite.com Mineral Locations 6 - EUROmin Project 7 -Google Images 8 -Google Scholar 9 -Handbook of Mineralogy (MinSocAm) 10 -Handbook of Mineralogy (UofA) 11 - HyperPhysics 12 -MinDAT 13 -MinMax(Deutsch) 14 -MinMax(English) 15 -Mineralienatlas (Deutsch) 16 - Minerals in Thin Section-University of North Carolina 17 -Minerals in Thin Sections-Humboldt State 18 - Minerals of Wisconsin 19 -QUT Mineral Atlas 20 - UCLA - Petrography Thin-Sections 21 - WWW-MINCRYST 22 -École des Mines de Paris

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Glaucophane

[ ]Na2(Mg3Al2)Si8O22(OH)2
Dana No: 66.1.3c.1 Strunz No: VIII/F.08-10
Locality:

 

Notes:

 
 
   
 
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