...Chi Ma; George R. Rossman Abstract Grossmanite, Ca(Ti 3+ ,Mg,Ti 4+ )AlSiO 6 with an end-member formula CaTi 3+ AlSiO 6 , is a new member of the Ca clinopyroxene group, where the trivalent cations are dominant in the M1 site with Ti 3+ being the dominant trivalent cation. It occurs as micrometer...

..., including allendeite (Sc 4 Zr 3 O 12 ) and hexamolybdenum (Mo,Ru,Fe) ( Ma et al. 2009a ), monipite (MoNiP) ( Ma et al. 2009b ), tistarite (Ti 2 O 3 ) ( Ma and Rossman 2009a ), davisite (CaScAlSiO 6 ) ( Ma and Rossman 2009b ), and grossmanite (CaTi 3+ AlSiO 6 ) ( Ma and Rossman 2009c ). Each new phase adds...

... of refractory silicates, joining other nine refractory silicates melilite, Al,Ti-diopside, anorthite, rhönite, and newly approved davisite Ca(Sc,Mg,Ti 3+ ,Ti 4+ )AlSiO 6 ( Ma and Rossman 2009b ), grossmanite Ca(Ti 3+ ,Mg,Ti 4+ )AlSiO 6 ( Ma and Rossman 2009c ), kushiroite CaAlAlSiO 6 ( Kimura et al. 2009...

... allendeite, grossmanite, hexamolybdenum, and hibonite-(Fe), which were described by Ma and Rossman (2009b) , Ma et al. (2009b) , and Ma (2010) , are also present in this section. The holotype grain of monipite is 1 × 2 μm in the plane of the section (see Figs. 1 and 2 ; see Fig. 1 for a larger...

... mineral from the Allende meteorite . American Mineralogist , 94 , 841 – 844 . Ma , C. , Beckett , J.R. , and Rossman , G.R. ( 2010 ) Grossmanite, davisite, and kushiroite: Three newly-approved diopside-group clinopyroxenes in CAIs . 41st Lunar and Planetary Science Conference...

... in the Allende CAIs include perovskite CaTiO 3 , Ti,Al-diopside Ca(Mg,Ti)(Si,Al) 2 O 6 , tazheranite (Zr,Ti,Ca,Y)O 1.75 ( Ma and Rossman 2008b ), tistarite Ti 2 O 3 ( Ma and Rossman 2009a ), rutile TiO 2 ( Ma et al. 2009 ), davisite Ca(Sc,Ti,Mg)AlSiO 6 ( Ma and Rossman 2009b ), grossmanite CaTiAlSiO 6 ( Ma...

... vein composed of grossular plus a highly aluminous phase (corundum?) intersects the spinel on one side and there are also some small blebs of grossmanite (boundary clinopyroxenes in the parlance of Paque et al. 2009 ). ...

... to this section. Nuwaite was identified in two additional sections from the Caltech collection (Allende 12, sections B2 and F) and from USNM 7554, which also sections ACM -2. In addition to nuwaite and butianite, holotype material for three recently described new minerals, grossmanite and monipite in section...

... respectively. In Vigarano it occurs in ultra-refractory fragment with Zr-panguite, spinel and davisite-diopside, all enclosed within forsterite aggregate. In Allende it found in fluffy type A (FTA) CAI with primary gehlenitic melilite, perovskite, spinel, hibonite, corundum, davisite, grossmanite, diopside...

... solubility. The presence of Ti 3+ in minerals is widely interpreted to be a hallmark of very reducing petrogenetic conditions. Trivalent titanium is an essential structural component of tistarite (Ti 2 O 3 ) and grossmanite (CaTiAlSiO 6 ) from Ca-,Al-rich inclusions (CAIs) of the Allende meteorite...

... minerals, as well as eringaite and Ti 3+ -dominant fassaite (grossmanite). Rubinite significantly enriched in Y, Sc, and Zr was found in an ultra-refractory inclusion in the Vigarano meteorite with spinel, panguite, fassaite, and davisite, which is enclosed in an AOA. URI rubinite. Rubinite...

.... , 1983 . Pyroxene thermometry . Am. Mineral. 68 ( 5–6 ), 477 – 493 . Ma , Chi , Rossman , G.R. , 2009 . Grossmanite, CaTi 3 + AlSiO 6 , a new pyroxene from the Allende meteorite . Am. Mineral. 94 ( 10 ), 1491 – 1494...

... and Clark 1973 ; Haring et al. 2012 ), which departs a little more from regularity than in diopside. Fassaite compositions are commonly described as solid solutions of four end-members: diopside; kushiroite, CaAl(Al,Si)O 6 ; grossmanite, CaTi 3+ (Al,Si)O 6 ; and a Ti 4+ component, CaTi 4+ Al 2 O 6 . Note...

.... Other primary phases in the CAI are spinel, perovskite, grossmanite-davisite, hibonite, and refractory metal grains. Beckettite occurs within highly altered areas of A-WP1 and forms aggregates of grains 48 μm in the central portions of alteration regions composed of fine-grained secondary corundum...