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About GrossmaniteHide

Lawrence Grossman
CaTi3+ AlSiO6
Light gray
Specific Gravity:
3.41 (Calculated)
Crystal System:
Name in honor of Lawrence Grossman (b. 1946), Professor of Cosmochemistry at the University of Chicago, Illinois, USA. He made significant contributions to meteorite research.
Pyroxene Group. Clinopyroxene Subgroup. The Ti3+ analogue of burnettite (V), davisite (Sc), esseneite (Fe3+), and kushiroite (Al).

One of just a few currently known phases with essential trivalent Ti, by tistarite, 'UM1971-21-SiO:AlCaMgTi' and 'UM1978-08-O:AlCaCrFeMgTi'.

Common in both fluffy and compact types of Ca-Al-rich inclusions (CAIs) of a chondrite. Probably formed in residual melt pockets.

Classification of GrossmaniteHide

Approval Year:
First Published:

9 : SILICATES (Germanates)
D : Inosilicates
A : Inosilicates with 2-periodic single chains, Si2O6; pyroxene family

Physical Properties of GrossmaniteHide

Light gray
3.41 g/cm3 (Calculated)

Chemical Properties of GrossmaniteHide

CaTi3+ AlSiO6
IMA Formula:

Crystallography of GrossmaniteHide

Crystal System:
Class (H-M):
2/m - Prismatic
Space Group:
Cell Parameters:
a = 9.884 Å, b = 8.988 Å, c = 5.446 Å
β = 105.86°
a:b:c = 1.1 : 1 : 0.606
Unit Cell V:
465.39 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
2.996 (100)
2.964 (31)
2.909 (25)
2.581 (42)
2.5605 (28)
2.535 (47)
2.130 (19)
1.431 (19)

Type Occurrence of GrossmaniteHide

General Appearance of Type Material:
1-7 micron particles
Place of Conservation of Type Material:
Smithsonian USNM 7562
Geological Setting of Type Material:
Carbonaceous chondrite meteorite
Associated Minerals at Type Locality:
Ma, C., Rossman, G.R. (2009) Grossmanite, CaTi3+AlSiO6, a new pyroxene from the Allende meteorite. American Mineralogist: 94: 1491–1494.

Synonyms of GrossmaniteHide

Related Minerals - Nickel-Strunz GroupingHide

9.DA.ProtoenstatiteMg2Si2O6Orth. mmm (2/m 2/m 2/m) : Pbcn
9.DA.05EnstatiteMgSiO3Orth. mmm (2/m 2/m 2/m) : Pbca
9.DA.05FerrosiliteFeSiO3Orth. mmm (2/m 2/m 2/m) : Pbca
9.DA.10ClinoenstatiteMgSiO3Mon. 2/m : P21/b
9.DA.10ClinoferrosiliteFe2+SiO3Mon. 2/m : P21/b
9.DA.10KanoiteMn2+(Mg,Mn2+)Si2O6Mon. 2/m : P21/b
9.DA.10Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6Mon. 2/m : P21/b
9.DA.15Augite(CaxMgyFez)(Mgy1Fez1)Si2O6Mon. 2/m : B2/b
9.DA.15DiopsideCaMgSi2O6Mon. 2/m : B2/b
9.DA.15EsseneiteCaFe3+[AlSiO6]Mon. 2/m : B2/b
9.DA.15HedenbergiteCaFe2+Si2O6Mon. 2/m : B2/b
9.DA.15JohannseniteCaMn2+Si2O6Mon. 2/m : B2/b
9.DA.15DavisiteCaScAlSiO6Mon. 2/m : B2/b
9.DA.15KushiroiteCaAl[AlSiO6]Mon. 2/m : B2/b
9.DA.20Aegirine-augite(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6Mon. 2/m : B2/b
9.DA.20Omphacite(NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6Mon. 2/m
9.DA.25AegirineNaFe3+Si2O6Mon. 2/m : B2/b

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for GrossmaniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Ma, C., Rossman, G.R. (2009) Grossmanite, CaTi3+AlSiO6, a new pyroxene from the Allende meteorite. American Mineralogist: 94: 1491–1494.

Internet Links for GrossmaniteHide

Localities for GrossmaniteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Mexico (TL)
  • Chihuahua
    • Pueblito de Allende
American Mineralogist, Volume 94, pages 1483–1486, 2009; Ma, C., Paque, J., & Tschauner, O. (2016, March). Discovery of Beckettite, Ca2V6Al6O20, a New Alteration Mineral in a V-Rich Ca-Al-Rich Inclusion from Allende. In Lunar and Planetary Science Conference (Vol. 47, p. 1704).
  • Mbeya Region
D. Frank, M. Zolensky, J. Martinez, T. Mikouchi, K. Ohsumi, K. Hagiya, W. Satake, L. Le, D. Ross & A. Peslier (2011). A CAI in the Ivuna CI1 Chondrite. 42nd Lunar and Planetary Science Conference. LPI Contribution #1608, p. 2785.
Mineral and/or Locality  
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