 | | Journal (article/letter/editorial) | | ABSTR ACT The composition of chevkinite and perrierite, the most common members of the chevkinite group...expressed by the formula A4BC2D2Si4O22, where A = (La,Ce,Ca,Sr,Th), B = Fe2+, C = (Fe2+,Fe3+,Ti,Al,Zr,Nb)...a linear array with r2 = 0.91. Chevkinite and perrierite are shown to be compositionally distinct on the...fenites associated with carbonatite complexes. Perrierite is more commonly recorded from igneous rocks...are reviewed briefly. K EY WORDS : chevkinite, perrierite, compositional variation. Introduction T HE |  | | Book (edition) | | Rosenzwcig (deceased) (USA). Jochen Schlilter (Germany), J. Sejkora (Czcch Republic), Masaaki Shimizu...Helium Holmium Al Sb A As Ba Be Bi B Br Cd Ca C Ce Cs Cl Cr Co Cu Dy Er Eu F Gd Ga Ge Au Hf He Ho Hydrogen...BSFM BSF.\IC BS.'.\' CfSJ CA CCA CoC\l CCM CCR CE CJM CJC Aufschlus.s Boletin Fac11/tadde cienncia...930-937, Science 223, 1075-1076 (str.) □ Abcnakiite-(Ce), Na2 lCc,REE) 0 (SiO 3 MPO,MCO;)iS'·o 2 )O, trig...escbynlte-(Ce),(Ce,Ca,Fc,Th)(Ti,Nb)i(O,OH) 6, orth., forms lwo series, with Nioboaeschynlte-(Ce)and with |  | | Book (edition) | | Prague Printedin Czech Republicby Finidr.u.o .. Ce,ky Te~in 14/02/03/0 I All rights reserved•• ·o pan...dominant rareearth element (REE). e.g. monazite-(Ce), monazite(Nd), etc. In a few cases a similar procedure...= 99°37' Z = 4. Stable by <173°C, Abenakiite-(Ce) a26(Ce,Nd)c,[Ol(C?,,)61all argentite specimens are actually...the Sailauf quarry, Spessart Mts., Bavaria. both Germany, and from the Rabejac deposit, Herault dept.. France... = = = = = Acanthite, x 16 mm, Freiberg, Germany, H Abernathyite, 12 mm, Ririera/, France, H Abhurite |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | Fritz: Bergakademie Freiberg, Freiberg, Saxony, Germany. Donald B. Hoover: U.S.G.S., Federal Center, Lakewood...Institut fur Mineralogie, Ruhr Universitat Bochum, Germany. Duane Mellor: Geology Library, Yale University...Berlin, Germany. Peter Susse: MINABS, Inst. of Mineralogy, Univ. of Gottingen, Gottingen, Germany. C. Sheldon...Pennsylvania. Hans J. Wilke: Eppertshausen/Hessen, Germany. Wendell E. Wilson: The Mineralogical Record, Tuscon...Commission on New Minerals and Mineral Names (CNMMN) ce; Proposals for a new mineral should include (1) the |
|
