Bustamite Mineral Data
General Bustamite Information
Chemical Formula:
(Mn,Ca)3Si3O9
Composition:
Molecular Weight = 381.92 gm
Calcium 7.87 % Ca 11.01 % CaO
Manganese 32.37 % Mn 41.79 % MnO
Silicon 22.06 % Si 47.20 % SiO2
Oxygen 37.70 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Mn2+ 2.25 Ca0.75 Si3 O9
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
PDF 44-1455
Bustamite Image
Images:
Bustamite
Comments: Very course crystals of brownish red bustamite to 3cm in pink calcite.
Location: Zinc Corp mine, Broken Hill, NSW, Australia.
Scale: 7 cm.
© John Attard
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 - Pinacoidal H-M Symbol ( 1 ) Space Group: P1
X Ray Diffraction:
By Intensity(I/Io ): 2.872(1), 3.195(0.7), 2.982(0.6),
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/electronU=PEBustamite x r Electron 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
(65.02) with chains P=3
(65.02.01) Wollastonite group
65.02.01.01a Wollastonite-1A CaSiO3 P1 1
65.02.01.01b Wollastonite-2M * CaSiO3 P 21 2
65.02.01.01c Wollastonite-3A-4A-5A-7A * CaSiO3 P1 1
65.02.01.02 Bustamite (Mn,Ca)3Si3O9 P1 1
65.02.01.03 Ferrobustamite Ca(Fe,Ca,Mn)Si2O6 P1 1
65.02.01.04 Pectolite NaCa2Si3O8(OH) P1 1
65.02.01.05 Serandite Na(Mn,Ca)2Si3O8(OH) P1 1
65.02.01.06 Cascandite Ca(Sc,Fe)Si3O8(OH) C1 1
65.02.01.07 Denisovite (K,Na)Ca2Si3O8(F,OH) Mono
65.02.01.08 Tanohataite ! LiMn2Si3O8(OH) P1 1
Strunz Class:
09.DG.05 09 - SILICATES (Germanates)
09.D - Inosilicates* Structural terminology according to Liebau (1985)
09.DG -Inosilicates with 3-periodic single and multiple chains
09.DG.05 Bustamite (Mn,Ca)3Si3O9 P1 1
09.DG.05 Ferrobustamite Ca(Fe,Ca,Mn)Si2O6 P1 1
09.DG.05 Pectolite NaCa2Si3O8(OH) P1 1
09.DG.05 Wollastonite-3A-4A-5A-7A * CaSiO3 P1 1
09.DG.05 Wollastonite-1A CaSiO3 P1 1
09.DG.05 Wollastonite-2M * CaSiO3 P 21 2
09.DG.05 Serandite Na(Mn,Ca)2Si3O8(OH) P1 1
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
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Bustamite
(Mn,Ca)3Si3O9
Dana No: 65.02.01.02 Strunz No: 09.DG.05
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