Rare earth Element bearing Apatites and Oxyapatites References


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Nomenclature of the apatite supergroup minerals | European ....

Nomenclature of the apatite supergroup minerals Marco Pasero. ... (1930) in the space group P6 3 /m, and typically all apatites crystallize in that space group. However, crystal structure refinement in lower symmetry space groups have been carried out ... as part of the general changes in the nomenclature of rare-earth minerals (Levinson ...

In situ lead immobilization by apatite - Environmental ....

In situ lead immobilization by apatite. Qi Ying Ma, Samuel J. Traina, Terry J. Logan, and James A ... Solubilization of Pb-bearing apatite Pb 5 (PO 4 ) 3 Cl by bacteria isolated from polluted environment ... Synthesis and Crystal Structure Characterization of Oxysilicate Apatites for Stabilization of Sr and Rare-Earth Elements. Jingxian Wang ...

Annual Report No 10 of CLMC - B...

1. Insignificant effect of varying Ca Sr ratios (x-parameter) on light-transmission in VIS and NIR and several alterations in UV (Fig. 1), related to different position and abundance of definite optical-active centers based on rare-earth ions embedded in the crystalline structure. 2.

Ceramic Mineral Waste-Forms for Nuclear Waste Immobilizati...

for rare-earth elements as in Ca2(Nd,Cm,Pu)8(SiO4)6O2, and fission products are also readily incorporated. However, the solubility for tetravalent Pu may be limited without other charge compensating substitutions. Apatite has been proposed as a potential host phase for Pu and high-level actinide wastes.

Bearing of rare earth patterns of apatites from igneous ....

Earth and Planetary Science Letters, 31 (1976) 279-286 279 Elsevier Scientific Publishing Company, Amsterdam - Printed in The Netherlands [31 BEARING OF RARE EARTH PATTERNS OF APAT1TES FROM IGNEOUS AND METAMORPHIC ROCKS HARALD PUCHELT and ROLF EMMERMANN Institut fit).Petrographie und Geoehemie, Universitiit Karlsruhe (Federal Republic of Germany) Received December 3, 1975 Revised version ...

Rare-earth Element-bearing Apatites and Oxyapatites ....

A number of prepared alkaline-earth-rare-earth silicates and germanates also have the structure of apatite type. The fifth chapter of this book then continues with description of synthetic compounds of apatite structure. Attention will be directed to description of rare-earth element bearing apatites and oxyapatites. The structure, properties and preparation of apatite-type silicates ...

Materials | Free Full-Text | Ceramic Mineral Waste-Forms ....

It has been shown that the rare earth elements from La 3+ through Lu 3+ can substitute for Ca 2+ and form oxyapatites, RE 4.67 0.33 [SiO 4] 3 O . It was also shown that even more complex but coupled substitutions were possible in the oxyapatite structure, such as:

Apatites and their Synthetic Analogues - Synthesis ....

3. Identification, Characterization and Properties of Apatites. By Petr Ptáček. 1430: Open access peer-reviewed. 4. Synthetic Phase with the Structure of Apatite. By Petr Ptáček. 1633: Open access peer-reviewed. 5. Rare-earth Element-bearing Apatites and Oxyapatites. By Petr Ptáček. 1600: Open access peer-reviewed. 6. Substituents and ...

3 Waste Forms - The National Academies Pre...

3 Waste Forms. The final charge of the statement of task for this study (see Box 2.1 in Chapter 2) calls for the identification and description of “potential new waste forms that may offer enhanced performance or lead to more efficient production.”This chapter, which is written primarily for technical audiences, addresses this charge by providing a brief review of waste form materials and ...

Geology and rare-earth element geochemistry ... - SpringerLi...

Geology and rare-earth element geochemistry of highly evolved, molybdenite-bearing granitic plutons, Southeastern Desert, Egypt

Humboldt Kolleg - MAFIADOC.C...

Prompted by the varied biological activities of the imidazoles, and in continuation of our work on the imidazoles, we herein report on the synthesis of new imidazoles bearing biphenyl piperazine residues with evaluation of their HIV-1 activity. Key words: Nitroimidazoles, Biological activities, AIDS.

(PDF) On the symmetry and crystal chemistry of britholite ....

On the symmetry and crystal chemistry of britholite: New structural and microanalytical data

Rare earth elements in apatite: Uptake from H2O-bearing phosphate-fluoride melts and the role of volatile componen...

Read "Rare earth elements in apatite: Uptake from H 2 O-bearing phosphate-fluoride melts and the role of volatile components, Geochimica et Cosmochimica Acta" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

(PDF) Exchange of light rare earths for Ca in apatite ....

Exchange of light rare earths for Ca in apatite. Comptes Rendus Geoscience, 2003. Bruce Velde. Saint-Clair Dujon. Bruce Velde. Saint-Clair Dujon. Download with Google Download with Facebook or download with email. Exchange of light rare earths for Ca in apatite. Download.

Full text of "Bibliography of the Geology and Mineralogy ....

Full text of "Bibliography of the Geology and Mineralogy of the Rare Earths and Scandium to 1971" See other formats

Natural and Synthetic Minerals - MAFIADOC.C...

Minerals as Advanced Materials I Sergey V. Krivovichev (Ed.) Minerals as Advanced Materials I Editor Prof. Dr. Sergey V. Krivovichev Department of Crystallography, Faculty of Geology St. Petersburg State University University Emb. 7/9 St. Petersburg Russia 199034 [email protected] ISBN: 978-3-540-77122-7

Rare earth elements in old biogenic apatites (Journal ....

The REE distributions in individual Upper Devonian conodonts have been measured by ion probe. The patterns of all analyzed conodonts are enriched in middle REE (Eu-Gd) and have a weak or no Ce anomaly. Concentrations and La/Yb or La/Sm ratios vary very little within or among individuals from the ...

Ptacek P. (Ed.) Apatites and their Synthetic Analogues ....

Contents Introduction to Apatites Other Minerals from the Supergroup of Apatite Identification, Characterization and Properties of Apatites Synthetic Phase with the Structure of Apatite Rare-earth Element-bearing Apatites and Oxyapatites Substituents and Dopants in the Structure of Apatite Phosphate Rocks Mining and Beneficiation of Phosphate ...

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Chapter 20018 provides scholary research titles of which PDF Full Texts are available through EurekaMag.

Structure et cristallisation de verres d oxydes simples - P...

1 THÈSE DE DOCTORAT DE L UNIVERSITÉ PIERRE ET MARIE CURIE Spécialité PHYSICO-CHIMIE DES MATÉRIAUX Présentée par Hélène TREGOUËT Pour obtenir le grade de DOCTEUR DE L UNIVERSITÉ PIERRE ET MARIE CURIE Structure et cristallisation de verres d oxydes simples riches en bore et en terres rares Devant le jury composé de : M. Frédéric ANGELI Examinateur M. George CALAS Examinateur M ...