General Fluorannite Information![]() KFe++3AlSi3O10F2 |
![]() Molecular Weight = 473.80 gm |
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Potassium 7.43 % K 8.95 % K2O |
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Lithium 0.29 % Li 0.63 % Li2O |
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Magnesium 1.03 % Mg 1.70 % MgO |
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Aluminum 7.97 % Al 15.06 % Al2O3 |
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Iron 27.11 % Fe 34.88 % FeO |
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Silicon 16.60 % Si 35.51 % SiO2 |
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Hydrogen 0.11 % H 0.95 % H2O |
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Oxygen 35.46 % O |
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Fluorine 4.01 % F 4.01 % F |
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- %
F -1.69 % -O=F2 |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
![]() K0.9Fe2+1.8Fe2+0.5Mg0.2Li0.2Al1.4SI2.8O10F(OH)0.5 |
![]() Rock forming mineral in the upper part of an A-type granite (Huangshan granite).F-analogue of annite. |
![]() Approved IMA 1999 (Dana # Added) |
![]() Western suburb of Suzhou City, near Shanghai, eastern China. Link to MinDat.org Location Data. |
![]() Named as fluorine-rich annite. |
![]() IMA1999-048 |
| | Fluorannite Image
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Fluorannite Crystallography![]() a:b:c =0.5781:1:1.0931 |
![]() a = 5.37, b = 9.289, c = 10.154, Z = 2; beta = 100.49° V = 498.04 Den(Calc)= 3.16 |
![]() Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m |
![]() By Intensity(I/Io): 10.09(1)(001), 3.336(0.56)(003), 5.02(0.13)(002),1.671(0.1), 2.004(0.1), 2.507(0.1)(131,004), 2.649(0.1), 2.933(0.1), 3.16(0.1), |
| Physical Properties of Fluorannite![]() {001} Perfect |
![]() Iron black. |
![]() 3.15 - 3.2, Average = 3.17 |
![]() Translucent |
![]() Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite). |
![]() Fibrous - Crystals made up of fibers. |
![]() Foliated - Two dimensional platy forms. |
![]() Tabular - Form dimensions are thin in one direction. |
![]() 3 - Calcite |
![]() Sub Metallic |
![]() gray |
| Optical Properties of Fluorannite![]() CI meas= 0 (Superior) - where the CI = (1-KPDmeas/KC) |
CI calc= -0.005 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1996,KPDmeas= 0.1986,KC= 0.1986 Ncalc = 1.63 - 1.64 ![]() Biaxial (-), a=1.596, b=1.648, g=1.648, bire=0.0520 |
| Calculated Properties of Fluorannite![]() Bulk Density (Electron Density)=3.09 gm/cc |
note: Specific Gravity of Fluorannite =3.18 gm/cc. ![]() Fermion Index = 0.01 |
Boson Index = 0.99 ![]() PEFluorannite = 9.76 barns/electron |
U=PEFluorannite x relectron= 30.20 barns/cc. ![]() |
GRapi = 104.39 (Gamma Ray American Petroleum Institute Units)
Estimated Radioactivity from Fluorannite | Fluorannite Classification![]() 71.02.02b.03a (71)Phyllosilicate Sheets of Six-Membered Rings |
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(71.02)with 2:1 Layers |
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(71.02.02b)Mica Group (Biotite subgroup) |
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![]() 09.EC.20 09 - SILICATES (Germanates) |
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09.E - Phyllosilicates |
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09.EC -Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets |
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| Other Fluorannite Information![]() NAME( AmMin, Vol 86, p 1534) PHYS. PROP.(AmMin, Vol 86, p 1534) OPTIC PROP.(AmMin, Vol 86, p 1534) |
![]() Links to other databases for Fluorannite : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - GeoScienceWorld 4 - Google Images 5 - Google Scholar 6 - MinDAT 7 - Mineralienatlas (Deutsch) 8 - Online Mineral Museum 9 - QUT Mineral Atlas 10 - Ruff.Info Search for Fluorannite using: Visit our Advertisers for Fluorannite : A Bijoux Google Search for FluoranniteAdam's Minerals Google Search for Fluorannite Cape Minerals Google Search for Fluorannite Dakota Matrix Minerals Google Search for Fluorannite Excalibur Mineral Corp. Google Search for Fluorannite Exceptional Minerals Google Search for Fluorannite John Betts Fine Minerals Search for Fluorannite McDougall Minerals Google Search for Fluorannite Mineral News Website Link Rock and Mineral Shows Google Search for Fluorannite Weinrich Minerals, Inc. Google Search for Fluorannite Ask about Fluorannite here : Print or Cut-and-Paste your Fluorannite Specimen Label here :
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