Grossmanite Mineral Data

General Grossmanite Information

Chemical Formula:

CaTi+++AlSiO6

Composition:

Molecular Weight = 239.02 gm

Calcium 16.77 % Ca 23.46 % CaO

Titanium 20.03 % Ti 30.07 % Ti₂O₃

Aluminum 11.29 % Al 21.33 % Al₂O₃

Silicon 11.75 % Si 25.14 % SiO₂

Oxygen 40.16 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaTiAlSiO₆

IMA Status:

Proposed IMA 2009

Locality:

Allende meteorite. Link to MinDat.org Location Data.

Name Origin:

Commission on New Minerals, Nomenclature and Classification (CNMNC)

Synonym:

IMA2008-042a

Grossmanite Crystallography

Axial Ratios:

a:b:c =1.0996:1:0.6059

Cell Dimensions:

a = 9.884, b = 8.988, c = 5.446, Z = 4; beta = 105.86° V = 465.39 Den(Calc)= 3.41

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m

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

By Intensity(I/I_o): 2.996(1), 2.535(0.47), 2.581(0.42),2.964(0.31), 2.5605(0.28), 2.909(0.25), 1.431(0.19), 2.13(0.19),

Optical Properties of Grossmanite

Optical Data:

NCalc= 1.77 - from Gladstone-Dale relationship (KC = 0.226) where Ncalc=Dcalc*KC+1

Calculated Properties of Grossmanite

Electron Density:

Bulk Density (Electron Density)=3.34 gm/cc
note: Specific Gravity of Grossmanite =3.41 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_Grossmanite= 6.13 barns/electron
U=PE_Grossmanite x rElectron Density= 20.46 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Grossmanite is Not Radioactive

Grossmanite Classification

Dana Class:

65.00.00.00 (65)Inosilicate Minerals

(65.00)Without Dana Classification Numbers

(65.00.00)Silicate, Unclassified

65.00.00.00 Ashcroftine-(Ce)* K5Na5(Ce,Ca)12Si28O70(OH)2(CO3)8•8(H2O) I 4/mmm 4/m 2/m 2/m

65.00.00.00 Brokenhillite* (Mn,Fe)32[Si24O60]OH29Cl11 P 6₃mc 6mm

65.00.00.00 Grossmanite CaTiAlSiO6 C 2/m 2/m

65.00.00.00 Hypersthene? (Mg,Fe)2Si2O6 2/m 2/m 2/m

65.00.00.00 IMA2007-015 K(CaNa)(Fe3Al2)(Si6Al2)O22(OH)2 C 2/m 2/m

65.00.00.00 IMA2008-070 NaLi2(Fe2Al2Li)(Si6Al2)O22F2 C 2/m 2/m

65.00.00.00 IMA2009-010 [Ba6(PO4)2(CO3)][Fe7(OH)4Fe2O2(SiO3)8] P1 1

65.00.00.00 IMA2009-012 NaNa2(Mg2Al2Li)Si8O22F2 C 2/m 2/m

65.00.00.00 Kushiroite CaAl2SiO6 C 2/c 2/m

65.00.00.00 Plumalsite* Pb4Al2(SiO3)7(?) Unk Ortho

Strunz Class:

09.DX.00 09 - SILICATES (Germanates)

09.D - Unclassified Strunz Inosilicates

09.DX -Silicate, Unclassified

09.DX.00 Hypersthene? (Mg,Fe)2Si2O6 2/m 2/m 2/m

09.DX.00 Plumalsite* Pb4Al2(SiO3)7(?) Unk Ortho

09.DX.00 IMA2008-070 NaLi2(Fe2Al2Li)(Si6Al2)O22F2 C 2/m 2/m

09.DX.00 IMA2007-015 K(CaNa)(Fe3Al2)(Si6Al2)O22(OH)2 C 2/m 2/m

09.DX.00 Tanohataite! LiMn2Si3O8(OH) P1 1

09.DX.00 Punkaruaivite! Li{Ti2(OH)2[Si4O11(OH)]}•H2O C 2/c 2/m

09.DX.00 Yegorovite! Na4[Si2O4(OH)2]2•7H2O P 2₁/c 2/m

09.DX.00 Kushiroite CaAl2SiO6 C 2/c 2/m

09.DX.00 Grossmanite CaTiAlSiO6 C 2/m 2/m

09.DX.00 IMA2009-009 KNa2Li(Mg,Fe)2Ti2Si8O24 C 2/m 2/m

09.DX.00 IMA2009-010 [Ba6(PO4)2(CO3)][Fe7(OH)4Fe2O2(SiO3)8] P1 1

09.DX.00 IMA2009-012 NaNa2(Mg2Al2Li)Si8O22F2 C 2/m 2/m

Other Grossmanite Information

See Also:

Links to other databases for Grossmanite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your Grossmanite Specimen Label here :

Grossmanite

CaTi+++AlSiO6
Dana No: 65.00.00.00 Strunz No: 09.DX.00
Locality:

Notes:

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