Winchite Mineral Data + Say WINCHITE

General Winchite Information
Help on Chemical Formula: Chemical Formula: [ ](CaNa)Mg4(Al,Fe3+)Si8O22(OH)2
Help on Composition: Composition: Molecular Weight = 828.18 gm
   Potassium   0.47 %  K     0.57 % K2O
   Sodium      2.61 %  Na    3.52 % Na2O
   Calcium     6.15 %  Ca    8.60 % CaO
   Magnesium  12.53 %  Mg   20.78 % MgO
   Manganese   0.53 %  Mn    0.69 % MnO
   Aluminum    1.01 %  Al    1.91 % Al2O3
   Iron        3.71 %  Fe    5.30 % Fe2O3
   Silicon    26.38 %  Si   56.44 % SiO2
   Hydrogen    0.24 %  H     2.18 % H2O
   Oxygen     46.36 %  O
             ______        ______ 
             100.00 %       99.98 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca1.27Na0.94K0.1Mg4.27Fe3+0.55Al0.09Mn2+0.08Si7.78Al0.22O22(OH)2
Help on Environment: Environment: Metamorphosed Mn deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1906
Help on Locality: Locality: Kajlidongri, Jhabua, Madhya Pradesh, India. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its composition and for Howard J. Winch, Geological survey of India.
Help on Synonym: Synonym: Aluminowinchite
  PDF 20-1390
 

Winchite Image

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Winchite

Comments: Magenta crystalline winchite in manganese ore.
Location: Tirodi Mines, Madhya Pradesh, India. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species
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Winchite   Sodalite

Comments: Purple sodalite with some crystal faces, supporting a very sharp, transparent winchite crystal, terminated on one end.
Location: Sar-e-Sang, Kokcha Valley, Badakshan Province, Afghanistan. Scale: 11x10x8 mm.
© Richard Dale / Dale Minerals

Winchite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.5444:1:0.2934
Help on Cell Dimensions: Cell Dimensions: a = 9.834, b = 18.062, c = 5.3, Z = 2; beta = 104.4° V = 911.82 Den(Calc)= 3.02
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): 2.7(1), 2.53(0.9), 8.4(0.9),3.4(0.7), 4.48(0.7), 3.12(0.5), 2.98(0.4), 2.58(0.3),
Click Here for Large Winchite Structure Window Crystal Structure:

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Sokolova E V , Hawthorne F C , Gorbatova V , McCammon C , Schneider J , The Canadian Mineralogist , 39 (2001) p.171-177, Ferrian winchite from the Ilmen mountains, southern Urals,, Russia and some problems with the current scheme for amphibole nomenclature, Locality: Ilmen mountains, southern Urals, Russia, Note: x-coordinate of T1 and all coordinates of O6, adjusted to match reported bond lengths

View Additional jPOWD Structure files for Winchite
[1]
 

Physical Properties of Winchite

Help on Cleavage: Cleavage: [110] Perfect
Help on Color: Color: Cobalt blue, Violet blue.
Help on Density: Density: 2.96
Help on Diaphaniety: Diaphaniety: Translucent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: pale bluish gray
 

Optical Properties of Winchite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.01 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.01 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2121,KPDmeas= 0.2164,KC= 0.2142
Help on Optical Data: Optical Data: Biaxial (-), a=1.629, b=1.643, g=1.65, bire=0.0210, 2V(Calc)=70, 2V(Meas)=64. Dispersion r > v strong.
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): light blue violet.
Help on Pleochroism (z): Pleochroism (z): blue violet.
 

Calculated Properties of Winchite

Help on Electron Density: Electron Density:

relectron=3.01 gm/cc
note: rWinchite =3.02 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.02594
Boson Index = 0.97406
Help on Photoelectric: Photoelectric:

PEWinchite = 3.39 barns/electron
U=PEWinchite x relectron= 10.18 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 6.78 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Winchite - barely detectable

 

Winchite Classification
Help on Dana Class: Dana Class: 66.1.3b.1 (66)Inosilicate Double-Width Unbranched Chains, W=2
  (66.1)Dana Type
  (66.1.3b)Group 3, the sodic-calcic amphiboles
 
66.1.3b.1 Winchite [](CaNa)Mg4(Al,Fe3)Si8O22(OH)2 C 2/m 2/m
 
66.1.3b.1a Parvowinchite Na(NaMn)(Mg4Fe)Si8O22(OH)2 C 2/m 2/m
 
66.1.3b.2 Ferrowinchite [](CaNa)Fe4(Al,Fe)Si8O22(OH)2 C 2/m 2/m
 
66.1.3b.3 Ferriwinchite NaCaMg4FeSi8O22(OH)2 C 2/m 2/m
 
66.1.3b.4 Ferroferriwinchite* CaNa(Fe,Mg)4Fe[Si8O22](OH)2 C 2/m 2/m
 
66.1.3b.5 Barroisite [](CaNa)Mg3AlFeSi7AlO22(OH)2 C 2/m 2/m
 
66.1.3b.5a Aluminobarroisite! []CaNaMg3Al2(Si7Al)O22(OH)2 C 2/m 2/m
 
66.1.3b.6 Ferrobarroisite [](CaNa)Fe3AlFeSi7AlO22(OH)2 C 2/m 2/m
 
66.1.3b.6a Aluminoferrobarroisite! []CaNa(Fe2)3Al2(Si7Al)O22(OH)2 C 2/m 2/m
 
66.1.3b.7 Ferribarroisite CaNa(Fe,Mg)3Fe2[AlSi7O22](OH)2 C 2/m 2/m
 
66.1.3b.8 Ferroferribarroisite* CaNa(Fe,Mg)3Fe2[AlSi7O22](OH)2 C 2/m 2/m
 
66.1.3b.8a Ferri-ferrobarroisite! []CaNa(Fe)3(Fe)2(Si7Al)O22(OH)2 C 2/m 2/m
 
66.1.3b.9 Richterite Na(CaNa)(Mg,Fe)5[Si8O22](OH)2 C 2/m 2/m
 
66.1.3b.9a Fluororichterite! Na(CaNa)Mg5[Si8O22]F2 C 2/m 2/m
 
66.1.3b.9b Potassic-fluororichterite! (K,Na)(CaNa)Mg5[Si8O22]F2 C 2/m 2/m
 
66.1.3b.9c Potassicrichterite! (K,Na)(CaNa)2Mg5[Si8O22](OH,F)2 C 2/m 2/m
 
66.1.3b.10 Ferrorichterite Na(CaNa)Fe5[Si8O22](OH)2 C 2/m 2/m
 
66.1.3b.11 Magnesiokatophorite Na(CaNa)Mg4AlSi7AlO22(OH)2 C 2/m 2/m
 
66.1.3b.12 Katophorite Na(CaNa)Fe4(Al,Fe)Si7AlO22(OH)2 C 2/m 2/m
 
66.1.3b.13 Magnesioferrikatophorite Na2Ca(Mg,Fe)4FeSi7AlO22(OH)2 C 2/m 2/m
 
66.1.3b.14 Ferrikatophorite Na2Ca(Fe,Mg)4Fe(Si7Al)O22(OH)2 C 2/m 2/m
 
66.1.3b.15 Magnesiotaramite Na(CaNa)Mg3ALFe[Si6Al2O22](OH)2 C 2/m 2/m
 
66.1.3b.15a Aluminomagnesiotaramite! NaCaNaMg3Al2[Si6Al2O22](OH)2 C 2/m 2/m
 
66.1.3b.16 Taramite Na(CaNa)Fe3AlFe[Si6Al2O22](OH)2 C 2/m 2/m
 
66.1.3b.17 Ferri-magnesiotaramite! NaCaNaMg3Fe2[Si6Al2O22](OH)2 C 2/m 2/m
 
66.1.3b.18 Ferritaramite Na(CaNa)(Fe,Mg)3Fe2[Si6Al2O22](OH)2 C 2/m 2/m
 
66.1.3b.19 IMA2003-050! NaCa2(Mg3FeAl)5(Si6Al2O22)F2 C 2/m 2/m
 
66.1.3b.20 IMA2003-062! Na(CaMn)2Mg5(Si7Al)O22(OH)2 C 2/m 2/m
 
66.1.3b.21 IMA2004-045! [](CaMn)S2Mg5Si8O22(OH)2 C 2/m 2/m
Help on Strunz Class: Strunz Class: VIII/F.09-90 VIII - Silicates
  VIII/F - Inosilicates (chain and band) double chains [Si4O11]6-, Na-Ca-Amphiboles
  VIII/F.09 - Amphibole group, Richterite - Ferrobarroisite series
 
VIII/F.09-10 Richterite Na(CaNa)(Mg,Fe)5[Si8O22](OH)2 C 2/m 2/m
 
VIII/F.09-12 Fluororichterite! Na(CaNa)Mg5[Si8O22]F2 C 2/m 2/m
 
VIII/F.09-14 Potassicrichterite! (K,Na)(CaNa)2Mg5[Si8O22](OH,F)2 C 2/m 2/m
 
VIII/F.09-16 Potassic-fluororichterite! (K,Na)(CaNa)Mg5[Si8O22]F2 C 2/m 2/m
 
VIII/F.09-20 Ferrorichterite Na(CaNa)Fe5[Si8O22](OH)2 C 2/m 2/m
 
VIII/F.09-30 Magnesiokatophorite Na(CaNa)Mg4AlSi7AlO22(OH)2 C 2/m 2/m
 
VIII/F.09-40 Magnesioferrikatophorite Na2Ca(Mg,Fe)4FeSi7AlO22(OH)2 C 2/m 2/m
 
VIII/F.09-50 Katophorite Na(CaNa)Fe4(Al,Fe)Si7AlO22(OH)2 C 2/m 2/m
 
VIII/F.09-60 Ferrikatophorite Na2Ca(Fe,Mg)4Fe(Si7Al)O22(OH)2 C 2/m 2/m
 
VIII/F.09-65 Aluminomagnesiotaramite! NaCaNaMg3Al2[Si6Al2O22](OH)2 C 2/m 2/m
 
VIII/F.09-70 Magnesiotaramite Na(CaNa)Mg3ALFe[Si6Al2O22](OH)2 C 2/m 2/m
 
VIII/F.09-75 Ferri-magnesiotaramite! NaCaNaMg3Fe2[Si6Al2O22](OH)2 C 2/m 2/m
 
VIII/F.09-80 Taramite Na(CaNa)Fe3AlFe[Si6Al2O22](OH)2 C 2/m 2/m
 
VIII/F.09-81 Ferritaramite Na(CaNa)(Fe,Mg)3Fe2[Si6Al2O22](OH)2 C 2/m 2/m
 
VIII/F.09-85 Parvowinchite Na(NaMn)(Mg4Fe)Si8O22(OH)2 C 2/m 2/m
 
VIII/F.09-90 Winchite [](CaNa)Mg4(Al,Fe3)Si8O22(OH)2 C 2/m 2/m
 
VIII/F.09-100 Ferrowinchite [](CaNa)Fe4(Al,Fe)Si8O22(OH)2 C 2/m 2/m
 
VIII/F.09-105 Ferriwinchite NaCaMg4FeSi8O22(OH)2 C 2/m 2/m
 
VIII/F.09-107 Aluminobarroisite! []CaNaMg3Al2(Si7Al)O22(OH)2 C 2/m 2/m
 
VIII/F.09-108 Aluminoferrobarroisite! []CaNa(Fe2)3Al2(Si7Al)O22(OH)2 C 2/m 2/m
 
VIII/F.09-110 Barroisite [](CaNa)Mg3AlFeSi7AlO22(OH)2 C 2/m 2/m
 
VIII/F.09-120 Ferrobarroisite [](CaNa)Fe3AlFeSi7AlO22(OH)2 C 2/m 2/m
 
VIII/F.09-125 Ferribarroisite CaNa(Fe,Mg)3Fe2[AlSi7O22](OH)2 C 2/m 2/m
 
VIII/F.09-126 Ferri-ferrobarroisite! []CaNa(Fe)3(Fe)2(Si7Al)O22(OH)2 C 2/m 2/m
 

Other Winchite Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic2)
Help on See Also: See Also: Links to other databases for Winchite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (MinSocAm) 8 -Handbook of Mineralogy (UofA) 9 -MinDAT 10 -MinMax(Deutsch) 11 -MinMax(English) 12 -Mineralienatlas (Deutsch) 13 -QUT Mineral Atlas 14 - WWW-MINCRYST 15 -École des Mines de Paris

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Winchite

[ ](CaNa)Mg4(Al,Fe3+)Si8O22(OH)2
Dana No: 66.1.3b.1 Strunz No: VIII/F.09-90
Locality:

 

Notes:

 
 
   
 
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