...), shomiokite- (Y), galena, sphalerite and rutile in cavities; earlier minerals are microcline, nepheline, annite, sodalite and zircon. Niveolanite occurs as soft fibrous (random, matted, radiating, subparallel, sheaf- or spray-like) aggregates up to 2 cm consisting of fibers up to 1.4 cm long and 0.01 mm thick...

...F ig . 6. Distribution of mixed complexes formed by the REE ( i.e., Y, Ln) nine-fold polyhedra and CO 3 groups (black) in the structures of lecoqite-(Y) (a) and shomiokite-(Y) (b). The Na cations are large circles, the O atoms of H 2 O molecules are medium circles, and the H atoms are small...

... (Ttn), and ( F ) aggregate of shomiokite crystals (pinkish orange) from a low-temperature hydrothermal vein. Geological maps are from Bussen and Sakharov ( 1972 ), Epshtein et al. ( 1972 ), and Yakovenchuk et al. ( 2005 ). AR = Archean; PR = Proterozoic ...

..., and incredibly, a mass of shomiokite-(Y) crystals estimated to weigh several tonnes, with individual crystals up to 10 × 25 cm in size. As the primary aim of the Pegmatite chapter is to acquaint the reader with the mode of occurrence of the rarer minerals described in the following chapter, no attempt is made...

...) Raman-spectroscopic studies of carbonates.1. High-pressure and high-temperature behavior of calcite, magnesite, dolomite and aragonite . Phys Chem Miner 20 : 1 – 18 Grice JD (1996) The crystal structure of shomiokite-(Y) . Can Mineral 34 : 649 – 655 Grice JD Chao GY...

...) for her contribution to the mineralogy of alkaline rocks, which included the discovery of crawfordite, gmelinite-K, kostylevite, lintisite, mineevite-(Y), nabaphite, paranatisite, paraumbite, sazykinaite-(Y), shkatulkalite, shomiokite-(Y), sitinakite, and umbite. The new mineral and its name have been...

... 120 P 6 3 [10] lokkaite-(Y) CaY 4 (CO 3 ) 7 ·9H 2 O 39.07 6.08 9.19 90 90 90 Pb 2 m [11] Pbm 2 Pbmm mckelveyite-(Y) NaCa(Ba,Sr) 3 (Y,REE)(CO 3 ) 6 ·3H 2 O 9.17 9.17 9.15 90 90 90 P 3̄ [12] shomiokite-(Y) Na 3 Y(CO 3 ) 3 ·3H 2 O 10.04...

...), thomasclarkite-(Y), adamsite-(Y), and shomiokite-(Y), which were also discovered in the Poudrette pegmatite. Lecoqite-(Y) has no structurally related minerals, although it shares common structural features with shomiokite-(Y). The mineral is late-stage hydrothermal, formed under hyperagpaitic conditions...

..., Keivy’s peralkaline granite Accessory Rhabdophane-(Ce) (Ce,La)(PO 4 ) · H 2 O Lovozero loparite deposit Accessory Rinkite (Na,Ca) 3 (Ca,Ce) 4 Ti(Si 2 O 7 ) 2 OF 3 Yuksporr lovchorrite deposit (Khibiny massif) Major ore mineral Shomiokite-(Y) Na 3 Y[CO 3 ] 3 · 3H 2 O Shomiokitovoye...

... cavities of a giant pegmatite: with albite, aegirine, shortite, rhodochrosite, epididymite, leifite, tainiolite, pyrrhotite, thermonatrite, nahpoite, and amorphous bitumen; with albite, aegirine, elpidite, lorenzenite, sphalerite, galena, shomiokite-(Y), trona, natron, and natroxalate; with elpidite...

..., gonnardite, siderite, petersenite-(Ce), franconite, and dawsonite. Rarer associated minerals are analcime, quartz, eudidymite, catapleiite, gaidonnayite, monazite-(Ce), calcite, adamsite-(Y), shomiokite-(Y), galena, sphalerite, and rutile. Some of the niveolanite-containing cavities exhibit brown films...

... lepersonnite-(Gd) [CaGd(UO 2 ) 24 (CO 3 ) 8 Si 4 O 28 ·60H 2 O] CaLa(UO 2 ) 24 (CO 3 ) 8 Si 4 O 28 ·60H 2 O Hydrous yttrium/Rare earth element carbonates NaLa(CO 3 ) 3 ·6H 2 O adamsite-(Y) [NaY(CO 3 ) 3 ·6H 2 O] NaCe(CO 3 ) 3 ·6H 2 O Na 3 La(CO 3 ) 3 ·3H 2 O shomiokite-(Y) [Na 3 Y(CO 3 ) 3...