PERRIERITE and chevkinite are rare R E E T i silicates reported from granitic and syenitic pegmatites and igneous rocks, volcanic ash beds, ignimbrites, and anorthosite (e.g. Jaffe et al., 1956; Young and Powers, 1960; Mitchell, 1966; Izett and Wilcox, 1968; Raade, 1970; Brooks and Rucklidge, 1976; Segalstad and Larsen, 1978; McDowell, 1979; Harding et al., 1982). The minerals are easily confus...

Allanite is present in most samples of the tonalitic Bell Island Pluton, with an average mode near 0.05 wt.%. Allanite occurs as cores in igneous epidote-clinozoisite and exhibits characteristic and consistent zoning patterns. REE-rich cores (All40–70) grade out towards epidote-clinozoisite with REE below electron microprobe detection limits. La, Ce and Pr contents are highest in the REE-rich c...

Icosahedrite, ideally Al63Cu24Fe13, is a new mineral from the Khatyrka River, southeastern Chukhotka, Russia. It occurs as dark gray-black anhedral to subhedral grains up to 100 μm across, closely associated with spinel, diopside, forsterite, nepheline, sodalite, corundum, stishovite, khatyrkite, cupalite, and an unnamed phase of composition AlCuFe. Icosahedrite is opaque with a metallic luster...

Kolicite, MnrZno(Aso4)r(sio4)r(oH)*, is a new mineral found in the Sterling Hill mine, ogdensburg, Sussex county, New Jersey. Kolicite is orthorhombic, space group Cmca, with a : 18.59(3), D : 8.789(5) and c: 12.04(l)A, V: l96j.lA3, Z:4. The six strongest l ines in the X-ray diffraction pauern (d n A, intensity, hkt) are:2.9j 100 023,512: 1.540 70 552, 5l:-. 644,842' 915; 3.58 60 rr3;2.608 50 5...

Krotite, CaAl2O4, occurs as the dominant phase in an unusual Ca-,Al-rich refractory inclusion from the NWA 1934 CV3 carbonaceous chondrite. Krotite occupies the central and mantle portions of the inclusion along with minor perovskite, gehlenite, hercynite, and Cl-bearing mayenite, and trace hexamolybdenum. A layered rim surrounds the krotite-bearing regions, consisting from inside to outside of...

Omsite (IMA 2012-025) is a new mineral from the Correc d’en Llinassos, Oms, Pyrénées-Orientales Department, France. It occurs as bright yellow to amber yellow discoidal tablets, flattened on {001}, which form rosettes typically 50 100 mm in diameter. Omsite generally crystallizes on siderite without associated supergene minerals; it occurs less commonly with glaukosphaerite. Crystals have a vit...