Ferrobustamite Mineral Data

Ferrobustamite Mineral Data +

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General Ferrobustamite Information

Chemical Formula:

Ca(Fe++,Ca,Mn)Si2O6

Composition:

Molecular Weight = 239.80 gm

Calcium 28.41 % Ca 39.75 % CaO

Manganese 1.15 % Mn 1.48 % MnO

Iron 6.99 % Fe 8.99 % FeO

Silicon 23.42 % Si 50.11 % SiO₂

Oxygen 40.03 % O

______ ______

100.00 % 100.33 % = TOTAL OXIDE

Empirical Formula:

Ca_1.7Fe²⁺_0.3Mn²⁺_0.05Si₂O₆

Environment:

Surrounding chert nodules in a skarn in dolostone (Isle of Skye, Scotland).

IMA Status:

Valid Species (Pre-IMA) 1937

Locality:

At Camas Malag, Isle of Skye, Scotland. Link to MinDat.org Location Data.

Name Origin:

For FERROan iron in its composition and its relation to bustamite.

Synonym:

ICSD 9297

Iron wollastonite

PDF 29-336

Ferrobustamite Image

Images:

Ferrobustamite

Comments: Grayish crystalline ferrobustamite with white calcite, golden colored phlogopite and green actinolite.
Location: Franklin, Sussex County, New Jersey, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ferrobustamite Crystallography

Axial Ratios:

a:b:c =1.0839:1:1.9256

Cell Dimensions:

a = 7.862, b = 7.253, c = 13.967, Z = 6; alpha = 89.44°, beta = 95.28°, gamma = 103.29° V = 771.79 Den(Calc)= 3.10

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.27(1), 3.049(0.8), 2.278(0.65),

Crystal Structure:

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Yamanaka T , Sadanaga R , Takeuchi Y , American Mineralogist , 62 (1977) p.1216-1224, Structural variation in the ferrobustamite solid solution, Wo82Fs18, Note: the sample is from the Ofuku mine, Yamaguchi Prefecture, Japan

Physical Properties of Ferrobustamite

Cleavage:

[100] Perfect, [001] Good, [102] Good

Color:

Green.

Density:

3.09

Diaphaniety:

Transparent to Translucent

Habit:

Massive - Granular - Common texture observed in granite and other igneous rock.

Hardness:

6 - Orthoclase

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Ferrobustamite

Gladstone-Dale:

CI meas= -0.008 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.005 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2085,KPDmeas= 0.2092,KC= 0.2075

Optical Data:

Biaxial (-), a=1.64, g=1.653, bire=0.0130, 2V(Meas)=60.

Calculated Properties of Ferrobustamite

Electron Density:

r_electron=3.08 gm/cc
note: r_{Ferrobustamite}=3.10 gm/cc.

Fermion Index

Fermion Index = 0.01299
Boson Index = 0.98701

Photoelectric:

PE_{Ferrobustamite}= 6.73 barns/electron
U=PE_{Ferrobustamite} x r_electron= 20.71 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Ferrobustamite is Not Radioactive

Ferrobustamite Classification

Dana Class:

65.2.1.3 (65)Inosilicate Single-Width Unbranched Chains, W=1

(65.2)with chains P=3

(65.2.1)Wollastonite group

65.2.1.1a Wollastonite-1A CaSiO3 P1 1

65.2.1.1b Wollastonite-2M* CaSiO3 P 2₁ 2

65.2.1.1c Wollastonite-3A-4A-5A-7A* CaSiO3 P1 1

65.2.1.2 Bustamite (Mn,Ca)3Si3O9 P1 1

65.2.1.3 Ferrobustamite Ca(Fe,Ca,Mn)Si2O6 P1 1

65.2.1.4 Pectolite NaCa2Si3O8(OH) P1 1

65.2.1.5 Serandite Na(Mn,Ca)2Si3O8(OH) P1 1

65.2.1.6 Cascandite Ca(Sc,Fe)Si3O8(OH) C1 1

65.2.1.7 Denisovite (K,Na)Ca2Si3O8(F,OH) Mono

Strunz Class:

VIII/F.18-30 VIII - Silicates

VIII/F - Inosilicates (chain and band) Triplet chains [Si3O9]6-

VIII/F.18 - Wollastonite-2M - Foshagite series

VIII/F.18-10 Wollastonite-1A CaSiO3 P1 1

VIII/F.18-10* Wollastonite-2M* CaSiO3 P 2₁ 2

VIII/F.18-10** Wollastonite-3A-4A-5A-7A* CaSiO3 P1 1

VIII/F.18-30 Ferrobustamite Ca(Fe,Ca,Mn)Si2O6 P1 1

VIII/F.18-40 Bustamite (Mn,Ca)3Si3O9 P1 1

VIII/F.18-50 Cascandite Ca(Sc,Fe)Si3O8(OH) C1 1

VIII/F.18-60 Pectolite NaCa2Si3O8(OH) P1 1

VIII/F.18-70 Denisovite (K,Na)Ca2Si3O8(F,OH) Mono

VIII/F.18-80 Serandite Na(Mn,Ca)2Si3O8(OH) P1 1

VIII/F.18-90 Foshagite Ca4Si3O9(OH)2 P 2₁/m 2/m

VIII/F.18-100 Hillebrandite Ca6Si3O9(OH)6 C mc2₁ mm2

Other Ferrobustamite 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 Ferrobustamite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris

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Ferrobustamite

Ca(Fe++,Ca,Mn)Si2O6
Dana No: 65.2.1.3 Strunz No: VIII/F.18-30
Locality:

Notes: