General Ferriwinchite Information![]() ([ ],Na)(Na,Ca)2(Mg, Fe++)4Fe+++[Si8O22](OH)2 |
![]() Molecular Weight = 845.75 gm |
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Potassium 0.42 % K 0.50 % K2O |
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Sodium 3.89 % Na 5.24 % Na2O |
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Calcium 3.70 % Ca 5.17 % CaO |
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Magnesium 8.65 % Mg 14.34 % MgO |
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Titanium 0.06 % Ti 0.09 % TiO2 |
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Manganese 0.58 % Mn 0.75 % MnO |
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Aluminum 0.61 % Al 1.15 % Al2O3 |
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Iron 12.48 % Fe 7.22 % FeO / 9.82 % Fe2O3 |
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Silicon 25.94 % Si 55.48 % SiO2 |
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Hydrogen 0.09 % H 0.80 % H2O |
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Oxygen 43.04 % O |
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Fluorine 0.56 % F 0.56 % F |
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- %
F -0.24 % -O=F2 |
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______ ______ |
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100.00 % 100.90 % = TOTAL OXIDE |
![]() Na0.21K0.09Ca0.78Na1.22Mg3.01Mn2+0.09Fe2+0.85Ti0.01Fe3+1.04Si7.81Al0.19O22(OH)0.75F0.25 |
![]() One of many amphibole-group minerals in late veins in the fenite halo of the Ilmen Mountains alkaline complex. |
![]() Approved IMA 1978 |
![]() Ilmen Mountains alkaline complex, Southern Urals. Link to MinDat.org Location Data. |
![]() Named as the Fe+++ analoge of winchite. |
![]() IMA2004-034 |
| | Ferriwinchite Image
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Ferriwinchite Crystallography![]() a:b:c =0.5446:1:0.2939 |
![]() a = 9.811, b = 18.014, c = 5.295, Z = 2; beta = 104.1° V = 907.62 Den(Calc)= 3.09 |
![]() Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m |
![]() By Intensity(I/Io): 8.42(1)(020,110), 3.116(0.6)(310 ), 2.711(0.2)(151 ),3.268(0.13)(240 ), 2.8(0.1)(330 ), 3.391(0.1)(131 ), |
| Physical Properties of Ferriwinchite![]() {110} Perfect, {110} Perfect |
![]() Blue violet, Black. |
![]() Transparent |
![]() Brittle - Uneven - Very brittle fracture producing uneven fragments. |
![]() Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
![]() 5-6 - Between Apatite and Orthoclase |
![]() Vitreous (Glassy) |
![]() greenish gray |
| Optical Properties of Ferriwinchite![]() CI calc= -0.013 (Superior) - where the CI = (1-KPDcalc/KC) |
KPDcalc= 0.2204,KC= 0.2176 Ncalc = 1.67 ![]() Biaxial (-), a=1.675, g=1.687, bire=0.0120, 2V(Meas)=82. |
![]() bright brownish yellw. |
![]() lilac. |
![]() dark blue. |
| Calculated Properties of Ferriwinchite![]() Bulk Density (Electron Density)=3.05 gm/cc |
note: Specific Gravity of Ferriwinchite =3.09 gm/cc. ![]() Fermion Index = 0.02 |
Boson Index = 0.98 ![]() PEFerriwinchite = 5.61 barns/electron |
U=PEFerriwinchite x relectron= 17.10 barns/cc. ![]() |
GRapi = 5.92 (Gamma Ray American Petroleum Institute Units)
Estimated Radioactivity from Ferriwinchite | Ferriwinchite Classification![]() 66.01.03b.03 (66)Inosilicate Double-Width Unbranched Chains, W=2 |
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(66.01)with P=2 amphibole configuration |
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(66.01.03b)Group 3, the sodic-calcic amphiboles |
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![]() 09.DE.20 09 - SILICATES (Germanates) |
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09.D - Inosilicates* Structural terminology according to Liebau (1985) |
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09.DE -Inosilicates with 2-periodic double chains, Si4O11; amphibole family |
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| Other Ferriwinchite Information![]() NAME( Dana8) PHYS. PROP.(AmMin, v91, p1203) OPTIC PROP.(AmMin, v91, p1203) |
![]() Links to other databases for Ferriwinchite : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - Ecole des Mines de Paris 4 - GeoScienceWorld 5 - Google Images 6 - Google Scholar 7 - MinDAT 8 - Mineralienatlas (Deutsch) 9 - Online Mineral Museum 10 - QUT Mineral Atlas 11 - Ruff.Info Search for Ferriwinchite using: Visit our Advertisers for Ferriwinchite : A Bijoux Google Search for FerriwinchiteAdam's Minerals Google Search for Ferriwinchite Cape Minerals Google Search for Ferriwinchite Dakota Matrix Minerals Google Search for Ferriwinchite Excalibur Mineral Corp. Google Search for Ferriwinchite Exceptional Minerals Google Search for Ferriwinchite John Betts Fine Minerals Search for Ferriwinchite McDougall Minerals Google Search for Ferriwinchite Mineral News Website Link Rock and Mineral Shows Google Search for Ferriwinchite Weinrich Minerals, Inc. Google Search for Ferriwinchite Ask about Ferriwinchite here : Print or Cut-and-Paste your Ferriwinchite Specimen Label here :
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