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Grossmanite
A valid IMA mineral species
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![CaTi3+ AlSiO6](#"/photo-918792.html"><img src="/image.pl?url=http%3a%2f%2fwww.mindat.org%2fimagecache%2fbc%2fab%2f07953660017272471812320.jpg&f=jpg&w=240" alt="07953660017272471812320.jpg" /></a><div><b>Lawrence Grossman</b></div></div></div><div><div><span>Formula:</span><div class=){kind=link}
Colour:
Light gray
Specific Gravity:
3.41 (Calculated)
Crystal System:
Monoclinic
Member of:
Name:
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 ofburnettite (V),davisite (Sc),esseneite (Fe3+), andkushiroite (Al).
The CaAl analogue ofcolomeraite (yet another Ti3+-rich clinopyroxene).
One of just a few currently known phases with essential trivalent Ti, bytistarite,'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.
CompareUM2004-50-SiO:AlFeGd.
The CaAl analogue ofcolomeraite (yet another Ti3+-rich clinopyroxene).
One of just a few currently known phases with essential trivalent Ti, bytistarite,'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.
CompareUM2004-50-SiO:AlFeGd.