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

Search for Grossmanite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

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 - PrismaticH-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

Search for Grossmanite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Grossmanite :

A Bijoux Google Search for Grossmanite
Adam's Minerals Google Search for Grossmanite
Cape Minerals Google Search for Grossmanite
Dakota Matrix Minerals Google Search for Grossmanite
Excalibur Mineral Corp. Google Search for Grossmanite
Exceptional Minerals Google Search for Grossmanite
John Betts Fine Minerals Search for Grossmanite
McDougall Minerals Google Search for Grossmanite
Mineral News Website Link
Rock and Mineral Shows Google Search for Grossmanite
Weinrich Minerals, Inc. Google Search for Grossmanite

Ask about Grossmanite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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: