Anthophyllite Mineral Data + Say ANTHOPHYLLITE

General Anthophyllite Information
Help on Chemical Formula: Chemical Formula: [ ]Mg7Si8O22(OH)2
Help on Composition: Composition: Molecular Weight = 780.82 gm
   Magnesium  21.79 %  Mg   36.13 % MgO
   Silicon    28.78 %  Si   61.56 % SiO2
   Hydrogen    0.26 %  H     2.31 % H2O
   Oxygen     49.18 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg7(Si8O22)(OH)2
Help on Environment: Environment: Metamorphic rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1861
Help on Locality: Locality: Bodenmais, Germany. Montana, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Latin anthophyllum - "clove" in allusion to the color.
Help on Synonym: Synonym: ICSD 40294
  PDF 42-544
 

Anthophyllite Image

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Anthophyllite   Biotite

Comments: Fibrous mass of anthophyllite as a shell around biotite.
Location: Hermanov, Severocesky, Czech Republic. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Anthophyllite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =1.0292:1:0.2929
Help on Cell Dimensions: Cell Dimensions: a = 18.554, b = 18.026, c = 5.28, Z = 5; V = 1,765.92 Den(Calc)= 3.67
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): 3.05(1), 3.24(0.6), 8.26(0.55),
Click Here for Large Anthophyllite Structure Window Crystal Structure:

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Walitzi E M , Walter F , Ettinger K , Zeitschrift fur Kristallographie , 188 (1989) p.237-244, Verfeinerung der kristallstruktur von anthophyllit vom Ochsenkogel/Gleinalpe, Osterreich

 

Physical Properties of Anthophyllite

Help on Cleavage: Cleavage: [110] Perfect, [???] Distinct, [???] Distinct
Help on Color: Color: White, Greenish gray, Green, Clove brown, Brownish green.
Help on Density: Density: 2.85 - 3.57, Average = 3.21
Help on Diaphaniety: Diaphaniety: Transparent to translucent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Lamellar - Thin laminae producing a lamellar structure.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 5-6 - Between Apatite and Orthoclase
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: gray
 

Optical Properties of Anthophyllite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.034 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.155 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1759,KPDmeas= 0.2011,KC= 0.2082
Help on Optical Data: Optical Data: Biaxial (+), a=1.598-1.674, b=1.605-1.685, g=1.615-1.697, bire=0.0170-0.0230, 2V(Calc)=82-90, 2V(Meas)=57-90. Dispersion r > v or r < v.
Help on Pleochroism (x): Pleochroism (x): pale green, pale tan brown, clove brown, or greenish yellow.
Help on Pleochroism (y): Pleochroism (y): brownish green, pale tan brown, clove brown, or greenish yellow.
Help on Pleochroism (z): Pleochroism (z): greenish blue, tan brown, smoky gray, dark brown, or grayish green.
 

Calculated Properties of Anthophyllite

Help on Electron Density: Electron Density:

relectron=3.21 gm/cc
note: rAnthophyllite =3.21 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.03546
Boson Index = 0.96454
Help on Photoelectric: Photoelectric:

PEAnthophyllite = 1.59 barns/electron
U=PEAnthophyllite x relectron= 5.11 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Anthophyllite is Not Radioactive
 

Anthophyllite Classification
Help on Dana Class: Dana Class: 66.1.2.2 (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.12-60 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 Anthophyllite 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 Anthophyllite :
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 -MinDAT 12 -MinMax(Deutsch) 13 -MinMax(English) 14 -Mineralienatlas (Deutsch) 15 - Minerals of Wisconsin 16 -QUT Mineral Atlas 17 - Scandinavian mineral gallery 18 -University of Colorado - Mineral Structure Data 19 - WWW-MINCRYST 20 -École des Mines de Paris

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Anthophyllite

[ ]Mg7Si8O22(OH)2
Dana No: 66.1.2.2 Strunz No: VIII/F.12-60
Locality:

 

Notes:

 
 
   
 
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