General Langbanite Information![]() (Mn,Ca,Fe)++4(Mn+++,Fe+++)9Sb+++++Si2O24 |
![]() Molecular Weight = 1,291.77 gm |
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Calcium 0.93 % Ca 1.30 % CaO |
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Manganese 47.63 % Mn 21.97 % MnO / 44.00 % Mn2O3 |
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Iron 6.05 % Fe 8.65 % Fe2O3 |
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Silicon 4.35 % Si 9.30 % SiO2 |
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Antimony 11.31 % Sb 13.54 % Sb2O3 |
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Oxygen 29.73 % O |
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______ ______ |
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100.00 % 98.76 % = TOTAL OXIDE |
![]() Mn2+3.7Ca0.3Mn3+7.2Fe3+1.4Mn2+0.3Sb1.2Si2O24 |
![]() In crystalline limestones and manganese-rich skarns in metamorphosed manganese deposits. |
![]() Valid Species (Pre-IMA) 1887 |
![]() At Langbanshyttan, Vermland, Sweden and the Sjo mines near Orebro in Orebro. Link to MinDat.org Location Data. |
![]() After its locality. |
![]() Langbanite + Pronunciation |
![]() | | Langbanite Image
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Langbanite Crystallography![]() a:b:c =0.5766:1:0.5523 |
![]() a = 11.561, b = 20.05, c = 11.075, Z = 6; beta = 90.03° V = 2,567.16 Den(Calc)= 5.01 |
![]() Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m |
![]() By Intensity(I/Io): 2.55(1), 2.74(0.9), 2.8(0.8), |
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| Physical Properties of Langbanite![]() {0001} Good |
![]() Iron black. |
![]() 4.91 |
![]() Opaque |
![]() Crystalline - Coarse - Occurs as well-formed coarse sized crystals. |
![]() Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
![]() 6.5 - Pyrite |
![]() Metallic |
![]() grayish black |
| Optical Properties of Langbanite![]() CI meas= -0.077 (Fair) - where the CI = (1-KPDmeas/KC) |
CI calc= -0.055 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2665,KPDmeas= 0.2719,KC= 0.2525 Ncalc = 2.24 - 2.27 ![]() Uniaxial (-), e=2.31, w=2.36, bire=0.0500. |
| Calculated Properties of Langbanite![]() Bulk Density (Electron Density)=4.68 gm/cc |
note: Specific Gravity of Langbanite =5.01 gm/cc. ![]() Fermion Index = 0.003469087 |
Boson Index = 0.996530913 ![]() PELangbanite = 50.37 barns/electron |
U=PELangbanite x rElectron Density= 235.82 barns/cc. ![]() GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Langbanite is Not Radioactive | Langbanite Classification![]() 44.03.04.01 (44)Antimonates |
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(44.03)with miscellaneous formulae |
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(44.03.04)Dana Group |
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![]() 09.AG.10 09 - SILICATES (Germanates) |
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09.A - Nesosilicates |
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09.AG -Nesosilicates with additional anions; cations in > [6] ± [6] coordination |
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| Other Langbanite Information![]() NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2) |
![]() Links to other databases for Langbanite : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - GeoScienceWorld 6 - Google Images 7 - Google Scholar 8 - Handbook of Mineralogy (MinSocAm) 9 - Handbook of Mineralogy (UofA) 10 - MinDAT 11 - Mineralienatlas (Deutsch) 12 - Online Mineral Museum 13 - QUT Mineral Atlas 14 - Ruff.Info 15 - WWW-MINCRYST Search for Langbanite using: Visit our Advertisers for Langbanite : A Bijoux Google Search for LangbaniteAdam's Minerals Google Search for Langbanite Cape Minerals Google Search for Langbanite Dakota Matrix Minerals Google Search for Langbanite Excalibur Mineral Corp. Google Search for Langbanite Exceptional Minerals Google Search for Langbanite John Betts Fine Minerals Search for Langbanite McDougall Minerals Google Search for Langbanite Mineral News Website Link Rock and Mineral Shows Google Search for Langbanite Weinrich Minerals, Inc. Google Search for Langbanite Ask about Langbanite here : Print or Cut-and-Paste your Langbanite Specimen Label here :
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