General Bustamite Information Chemical Formula: |
(Mn,Ca)3Si3O9 |
Composition: |
Molecular Weight = 381.92 gm |
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Calcium 7.87 % Ca 11.01 % CaO |
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Manganese 32.37 % Mn 41.79 % MnO |
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Silicon 22.06 % Si 47.20 % SiO2 |
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Oxygen 37.70 % O |
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100.00 % 100.00 % = TOTAL OXIDE |
Empirical Formula: |
Mn2+2.25Ca0.75Si3O9 |
Environment: |
In manganese ores formed by metamorphism of manganese-bearing sediments with attendant metasomatism. |
IMA Status: |
Valid Species (Pre-IMA) 1826 |
Locality: |
"Type" material, from Tetela de Ocampo, Hidalgo, Mexico, is a mixture. Link to MinDat.org Location Data. |
Name Origin: |
For General Anastasio Bustamente (1780-1853), of Mexico. |
Name Pronunciation: |
Bustamite + Pronunciation |
Synonym: |
ICSD 34164 |
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PDF 44-1455 |
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Images:
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Bustamite Crystallography Axial Ratios: |
a:b:c =2.1532:1:1.9275 |
Cell Dimensions: |
a = 15.46, b = 7.18, c = 13.84, Z = 8; alpha = 89.567°, beta = 94.883°, gamma = 102.783° V = 1,492.72 Den(Calc)= 3.40 |
Crystal System: |
Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1 |
X Ray Diffraction: |
By Intensity(I/Io): 2.872(1), 3.195(0.7), 2.982(0.6), |
Crystal Structure:
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Mouse
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| Physical Properties of Bustamite Cleavage: |
{100} Perfect, {110} Good, {110} Good |
Color: |
Brown red, Light pink, Pink. |
Density: |
3.32 - 3.43, Average = 3.37 |
Diaphaneity: |
Transparent to Translucent |
Hardness: |
5.5-6.5 - Knife Blade-Pyrite |
Luminescence: |
Fluorescent, Long UV=pink red. |
Luster: |
Vitreous (Glassy) |
Streak: |
white |
| Optical Properties of Bustamite Gladstone-Dale: |
CI meas= 0.016 (Superior) - where the CI = (1-KPDmeas/KC) |
CI calc= 0.023 (Excellent) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1989,KPDmeas= 0.2003,KC= 0.2036 Ncalc = 1.68 - 1.7 Optical Data: |
Biaxial (-), a=1.64-1.695, b=1.651-1.708, g=1.653-1.71, bire=0.0130-0.0150 |
Pleochroism (x): |
colorless. |
Pleochroism (y): |
colorless. |
Pleochroism (z): |
colorless. |
| Calculated Properties of Bustamite Electron Density: |
Bulk Density (Electron Density)=3.27 gm/cc |
note: Specific Gravity of Bustamite =3.38 gm/cc. Fermion Index: |
Fermion Index = 0.01 |
Boson Index = 0.99 Photoelectric: |
PEBustamite = 10.09 barns/electron |
U=PEBustamite x rElectron Density= 33.04 barns/cc. Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Bustamite is Not Radioactive | Bustamite Classification Dana Class: |
65.02.01.02 (65)Inosilicate Single-Width Unbranched Chains, W=1 |
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(65.02)with chains P=3 |
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(65.02.01)Wollastonite group |
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Strunz Class: |
09.DG.05 09 - SILICATES (Germanates) |
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09.D - Inosilicates* Structural terminology according to Liebau (1985) |
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09.DG -Inosilicates with 3-periodic single and multiple chains |
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| Other Bustamite Information References: |
NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
See Also: |
Links to other databases for Bustamite : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - Franklin Minerals(Dunn) 6 - Franklin Minerals(Palache) 7 - GeoScienceWorld 8 - Google Images 9 - Google Scholar 10 - Handbook of Mineralogy (MinSocAm) 11 - Handbook of Mineralogy (UofA) 12 - MinDAT 13 - Mineral and Gemstone Kingdom 14 - Mineralienatlas (Deutsch) 15 - Online Mineral Museum 16 - QUT Mineral Atlas 17 - Ruff.Info 18 - University of Colorado - Mineral Structure Data 19 - WWW-MINCRYST Search for Bustamite using: Visit our Advertisers for Bustamite : A Bijoux Google Search for BustamiteAdam's Minerals Google Search for Bustamite Cape Minerals Google Search for Bustamite Dakota Matrix Minerals Google Search for Bustamite Excalibur Mineral Corp. Google Search for Bustamite Exceptional Minerals Google Search for Bustamite John Betts Fine Minerals Search for Bustamite McDougall Minerals Google Search for Bustamite Mineral News Website Link Rock and Mineral Shows Google Search for Bustamite Weinrich Minerals, Inc. Google Search for Bustamite Ask about Bustamite here : Print or Cut-and-Paste your Bustamite Specimen Label here :
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