[Fine Minerals] [What's New] [Mineral Galleries] [My Collection] [Mineral Auctions] Dan Weinrich Fine Minerals Full-time professional mineral dealer with over 31 years experience in mineral collecting And 15 years selling mineral specimens on the internet and at major mineral shows 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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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 |
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Langbanite Crystallographya: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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Mouse
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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 LangbaniteCI 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 LangbaniteBulk 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 Classification44.03.04.01 (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 InformationNAME( 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 - 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 - Ruff.Info 15 - WWW-MINCRYST Search for Langbanite using: Visit our Advertisers for Langbanite : AA Mineral SpecimensB & L Fine Minerals Crystalarium.com Dan Weinrich Fine Minerals Dan Weinrich Auctions Dakota Matrix Diamond Dan Publications Excalibur Minerals Exceptional Minerals Fabre Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club Wrights Rock Shop Translate Langbanite Mineral Data : Ask about Langbanite here : Print or Cut-and-Paste your Langbanite Specimen Label here :
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