The silicon-cerium-oxynitride Ce5 (SiO4)3N with fluorapatite structure

1980 ◽  
Vol 15 (2) ◽  
pp. 521-522 ◽  
Author(s):  
J. P. Guha
Keyword(s):  
Fluorapatite Structure ◽  
Silicon Cerium

Monazite-(Ce) and xenotime-(Y) microinclusions in fluorapatite of the pegmatites from the Volta Grande mine, Minas Gerais state, southeast Brazil, as witnesses of the dissolution–reprecipitation process

2019 ◽  
Vol 83 (4) ◽  
pp. 595-606 ◽  
Author(s):  
Felipe Emerson André Alves ◽  
Reiner Neumann ◽  
Ciro Alexandre Ávila ◽  
Fabiano Richard Leite Faulstich
Keyword(s):  
Electron Probe ◽  
Minas Gerais ◽  
Compositional Variation ◽  
Partial Removal ◽  
Hydrous Fluid ◽  
Southeast Brazil ◽  
Pegmatite Body ◽  
Minas Gerais State ◽  
Fluorapatite Structure ◽  
Mineralogical Assemblage

AbstractFluorapatite with monazite-(Ce) and xenotime-(Y) microinclusions occurs in the lithium–caesium–tantalum pegmatite body A of the Volta Grande mine, Minas Gerais state, Southeast Brazil. The fluorapatite displays faint zoning, detected mainly by cathodoluminescence. Electron probe and laser ablation analyses indicate that zoning in the fluorapatite corresponds to variation in Mn and rare-earth element (REE) content. Such compositional variation is attributed to partial removal of the REE from the fluorapatite structure during a dissolution–reprecipitation process, forming monazite-(Ce) and xenotime-(Y) microinclusions in the REE-depleted zones of the fluorapatite. These inclusions exhibit an inherited geochemical signature, manifested by low Th and U concentrations when compared to monazite and xenotime crystallised from melts. Rhodochrosite and calcite inclusions are also associated with monazite-(Ce) and xenotime-(Y) and are probably products of the same process, recycling Ca, Mn, and CO32− from the fluorapatite through the following reaction: [Ca(5–2a–b–½x),Naa,(Y + REE)a,Mnb][(PO4)3–x(CO3)x(F)] + Fluid[a(2Ca2+ + P5+) + (x–b)(Ca2+) + H2O)] → [Ca5(PO4)3(F,OH)] + a[(Y + REE)PO4] + b[Mn(CO3)] + (x–b)[Ca(CO3)] + Fluid a[Na+].On the basis of new fluid-inclusion analyses, we propose that a hot (T > 204.5°C), salty (16 wt.% eq. NaCl, attributed to LiCl), hydrous fluid mediated the dissolution–reprecipitation of the fluorapatite. This fluid corresponds to similarly described Li-rich fluids which were suggested to have re-equilibrated the mineralogical assemblage at the Volta Grande mine.

Silicon cerium oxynitride

1977 ◽  
Vol 12 (1) ◽  
pp. 208-210 ◽  
Author(s):  
R. R. Wills ◽  
J. A. Cunningham
Keyword(s):  
Silicon Cerium

Comment on ?The crystal structure of the silicon cerium oxynitride Ce4Si2O7N2?

1980 ◽  
Vol 15 (1) ◽  
pp. 264-265 ◽  
Author(s):  
A. W. J. M. Rae ◽  
K. B. Buang ◽  
D. P. Thompson
Keyword(s):  
Crystal Structure ◽  
Silicon Cerium

STM and photoelectron spectroscopy studies of silicon-cerium dioxide interface formation

Vacuum ◽  
1998 ◽  
Vol 49 (3) ◽  
pp. 175-179 ◽  
Author(s):  
M Goshtasbi Rad ◽  
B Hirschauer ◽  
M Göthelid ◽  
UO Karlsson
Keyword(s):  
Photoelectron Spectroscopy ◽  
Cerium Dioxide ◽  
Interface Formation ◽  
Spectroscopy Studies ◽  
Silicon Cerium

SIRIUS S15

Alloy Digest ◽  
2004 ◽  
Vol 53 (11) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Oxidation Resistance ◽  
Temperature Performance ◽  
Aisi Type ◽  
Better Than ◽  
Silicon Cerium

Abstract Sirius S15 is a high-temperature stainless steel with the elements silicon, cerium, and lanthanum added for an oxidation resistance that is better than AISI Type 310. Applications are in burners, recuperators, and ducts. This datasheet provides information on composition, physical properties, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming and joining. Filing Code: SS-913. Producer or source: Industeel USA, LLC.

Comments on ?silicon cerium oxynitride?

1977 ◽  
Vol 12 (11) ◽  
pp. 2344-2345 ◽  
Author(s):  
D. P. Thompson ◽  
R. R. Wills ◽  
J. A. Cunningham
Keyword(s):  
Silicon Cerium

A novel catalyst of silicon cerium complex oxides for selective catalytic reduction of NO by NH3

2010 ◽  
Vol 28 (5) ◽  
pp. 721-726 ◽  
Author(s):  
Haitao XU ◽  
Yuesong SHEN ◽  
Chenghua SHAO ◽  
Fuwen LIN ◽  
Shemin ZHU ◽  
...  
Keyword(s):  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Complex Oxides ◽  
Reduction Of No ◽  
Novel Catalyst ◽  
Silicon Cerium

SIRIUS 314

Alloy Digest ◽  
2005 ◽  
Vol 54 (8) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Shear Strength ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Oxidation Resistance ◽  
Temperature Performance ◽  
Aisi Type ◽  
Silicon Cerium

Abstract Sirius 314 is a high-temperature stainless steel with the elements of silicon, cerium, and lanthanum added for better oxidation resistance compared to AISI Type 310. Applications are in burners, recuperators, and ducts. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and shear strength as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming and joining. Filing Code: SS-937. Producer or source: Industeel USA, LLC.

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