...Howard T. Evans; Edward J. Dwornik; Charles Milton Abstract Small (<0.5 mm), brownish-pink platy rosettes and yellow spherules, in cavities in nepheline syenite at the Diamond Jo quarry, Magnet Cove, Hot Spring County, Arkansas, have been identified as kassite, CaTi 2 O 4 (OH) 2 , a mineral...

...I.E. Grey; W.G. Mumme; I.V. Pekov; D.Yu. Pushcharovsky Abstract The crystal structure of kassite, ideally Ca[Ti 2 O 4 (OH) 2 ], containing 2 wt% Cr 2 O 3 , from the Saranovskoye chromite deposit, Perm’ district, Northern Urals, has been determined and refined to R 1 = 0.06 using single crystal X...

...Peter G. Self; Peter R. Buseck Abstract We have found the rare mineral kassite, CaTi 2 O 4 (OH) 2 , in an unusual rock from Josephine Creek, Oregon. Using electron-diffraction techniques, kassite was observed to have a b -centered orthorhombic unit cell with dimensions a = 0.908, b = 0.478, and c...

... suggested by Kukharenko et al. (1959) . The wrong chemical formula suggested for cafetite by Kukharenko et al. (1959) is probably due to admixtures of magnetite or titanomagnetite in their samples. Cafetite is chemically related to kassite, CaTi 2 O 4 (OH) 2 , but differs from it in structure and structural...

...Figure 7 Raman spectrum of kassite/cafetite (black line) and titanite (red line). The remaining characteristic bands (not belonging to titanite, carbonate, or serpentine or overlapping with these) are underlined. ...

...., Schneider, J., Pushcharovsky, D.Yu. (2004) X-ray powder diffractogram of kassite and its relationship to cafetite. Zapiski Vseross. Mineral. Obshch. 133(3), 51–55 (in Russian, English abstract). The powder X-ray diffraction pattern of kassite, Ca 2 Ti 2 O 4 (OH) 2 , from the Saranovsky chromite deposit...

... with intermediate rare kassite ( Martins et al. 2014 ). Kassite was observed in the reaction rims of ilmenite megacrysts in Monastery kimberlites, South Africa ( Kamenetsky et al. 2014 ), but not in our samples. Both an increase in CO 2 pressure in the fluid and a decrease in temperature shifts the reaction...

... on Alkaline Magmatism , Moscow , pp. 56 – 57 . Pekov I.V. Schneider J. Pushcharovsky D.Y. ( 2004 ) On the X-ray powder diffractogram of kassite and its relationship with cafetite . Zapiski Vserossiiskogo Mineralogicheskogo Obshchestva , 133 ( 3 ), 51 – 54 . Reguir E.P...

... ) as an occurrence of titanite, a priderite-group barian titanate now established as henrymeyerite ( Mitchell et al. 2000 ), leucophanite, titanian “hydrogarnet”, kassite, and other rare mineral species. The rischorritic host-rock differs from other poikilitic feldspathoid-bearing syenites of the Khibina complex...

.... ( 2003a ): The crystal structure of chromium kassite from the Saranovskoye deposit, northern Urals, Russia . Am. Mineral . 88 , 1331 – 1335 . Jambor , J.L. ( 1999 ): Nomenclature of the alunite supergroup . Can. Mineral . 37 , 1323 – 1341 . Jambor , J.L. , Owens , D.R...

... ). At higher temperatures in alkaline igneous rocks, Mitchell and Chakmouradian ( 1998 ) have described the alteration of perovskite to kassite, anatase, titanite, calcite and ilmenite in the presence of a CO 2 - and SiO 2 -rich fluid phase. Furthermore, Lumpkin et al. ( 1998 ) and Chakhmouradian et al...

... , W.G. , Pekov , I.V. & Pushcharovsky , D. Yu. ( 2003 ): The crystal structure of chromian kassite from the Saranovskoye deposit, northern Urals, Russia . Am. Mineral . 88 , 1331 – 1335 . Grice , J.D. & Williams , R. ( 1979 ): Famous mineral localities...

...). Premier mine, South Africa. (L) Perovskite with a pseudo-atoll texture. Note that the atoll rim (purple) is present only where perovskite (yellow) is integrown with MUM spinel (red). Matsoku, Lesotho. (M–N) Complex pseudomorphs after perovskite consisting of kassite (pale blue), anatase (blue) and Mn-rich...