Protoferro-anthophyllite Mineral Data + Say PROTOFERRO-ANTHOPHYLLITE


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General Protoferro-anthophyllite Information

Help on Chemical  Formula: Chemical Formula: (Fe++,Mn++)2(Fe++,Mg)5(Si4O11)2(OH)2
Help on Composition: Composition: Molecular Weight = 969.16 gm
   Magnesium   2.51 %  Mg    4.16 % MgO
   Manganese   5.67 %  Mn    7.32 % MnO
   Iron       28.81 %  Fe   37.07 % FeO
   Silicon    23.18 %  Si   49.60 % SiO2
   Hydrogen    0.21 %  H     1.86 % H2O
   Oxygen     39.62 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+5Mn2+MgSi8O22(OH)2
Help on Environment: Environment: Occurs in blocks of fayalite.
Help on IMA Status: IMA Status: Approved IMA 1998 (Dana # Added)
Help on Locality: Locality: Cheyenne Moutain area, El Paso County, Colorado, USA. Found in bedded Mn deposits at Yokoneyama, Tochigi Prefecture, Japan, and also in a pegmatite at Suishoyame, Fukushima Prefecture Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: The name indicates the structural relationship to protoamphiboles, and the compositional relationship to anthophyllite.
Help on Synonym: Synonym: IMA1986-006
 

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Protoferro-anthophyllite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5101:1:0.2905
Help on Cell Dimensions: Cell Dimensions: a = 9.382, b = 18.39, c = 5.343, Z = 2; V = 921.85 Den(Calc)= 3.49
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pnmn
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.353(1)(110), 2.56(0.92)(102,161), 3.074(0.64)(310),3.277(0.33)(240), 1.535(0.31)(0.12.0), 2.317(0.31)(202), 2.879(0.27)(151), 2.761(0.25)(002), 2.537(0.24)(112,251),
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Sueno S , Matsuura S , Gibbs G V , Boisen M B , Physics and Chemistry of Minerals , 25 (1998) p.366-377, A crystal chemical study of protoanthophyllite:, orthoamphiboles with the protoamphibole structure, Sample: PFA Hiruka Village

 

Physical Properties of Protoferro-anthophyllite

Help on Cleavage: Cleavage: [210] Perfect
Help on Color: Color: Light brownish yellow.
Help on Density: Density: 3.61
Help on Diaphaniety: Diaphaniety: Transparent
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Wheat Sheaf - Bundle shaped aggregates resembling wheat sheafs after hand reaping wheat.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Protoferro-anthophyllite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.028 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.006 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2031,KPDmeas= 0.1963,KC= 0.2019
Help on Optical Data: Optical Data: Biaxial (-), a=1.69, b=1.71, g=1.726, bire=0.0360
 

Calculated Properties of Protoferro-anthophyllite

Help on Electron Density: Electron Density:

relectron=3.41 gm/cc
note: rProtoferro-anthophyllite =3.49 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.01963
Boson Index = 0.98037
Help on Photoelectric: Photoelectric:

PEProtoferro-anthophyllite = 10.97 barns/electron
U=PEProtoferro-anthophyllite x relectron= 37.39 barns/cc.

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

Protoferro-anthophyllite is Not Radioactive

 

Protoferro-anthophyllite Classification

Help on  Dana Class: Dana Class: 66.1.2.3a (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.12-130 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 Protoferro-anthophyllite Information

Help on References: References: NAME( AmMin) PHYS. PROP.(Am.Min.,Vol.84,p196,1999) OPTIC PROP.(AmMin)
Help on See Also: See Also: Links to other databases for Protoferro-anthophyllite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas 10 - WWW-MINCRYST

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Print or Cut-and-Paste your Protoferro-anthophyllite Specimen Label here :

Protoferro-anthophyllite

(Fe++,Mn++)2(Fe++,Mg)5(Si4O11)2(OH)2
Dana No: 66.1.2.3a Strunz No: VIII/F.12-130
Locality:

 

Notes:

 

 
   
 
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