The chemistry of the phosphates of barium and tetravalent cations in the 1:1 stoichiometry
Journal Article
·
· Journal of Solid State Chemistry
- European Commission, Joint Research Centre, Institute for Transuranium Elements, P.O. Box 2340, 76125 Karlsruhe (Germany)
- Faculte des Sciences-Universite de Nantes, Institut des Materiaux Jean Rouxel-Laboratoire de Chimie des Solides, B.P. 32229, 44322 Nantes Cedex 3 (France)
- Institut fuer Mineralogie, Westfaelische Wilhelms-Universiaet, Corrensstr., 24, 48149 Muenster (Germany)
The chemistry of phosphates of barium and tetravalent cations [BaM{sup IV}(PO{sub 4}){sub 2}] is reviewed. Such phosphates crystallise in the C2/m space group for M{sup IV}=Ti, Zr, Hf, Ge, Sn, and Mo, and in the P2{sub 1}/n space group for BaTh(PO{sub 4}){sub 2}. The existence of BaM{sup IV}(PO{sub 4}){sub 2} in which M{sup IV}=Pb, Ce, and U is further evaluated. Several aspects, such as phase transitions in the compounds with yavapaiite structure, solid solutions of BaM{sup IV}(PO{sub 4}){sub 2} compounds and practical applications are briefly discussed. - Graphical abstract: Graphical representation of the variation of the unit-cell volume of BaM{sup IV}(PO{sub 4}){sub 2} as a function of the ionic radii of M{sup IV} cations. Such phosphates crystallise in the C2/m space group for M{sup IV}=Ti, Zr, Hf, Ge, Sn, and Mo, and in the P2{sub 1}/n space group for BaTh(PO{sub 4}){sub 2}. The 'BaCe(PO{sub 4}){sub 2}' phosphate previously reported does not exist, as demonstrated in the present paper. Taking into account the present evidence, it can be concluded at this stage that the existence of other Ce(IV) phosphates obtained at high temperature and reported into the literature becomes doubtful. Display Omitted.
- OSTI ID:
- 21043814
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 8 Vol. 180; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
Similar Records
M{sup II}Ge(PO{sub 4}){sub 2} (M=Ca, Sr, Ba): Crystal structure, phase transitions and thermal expansion
Crystal structure and thermal expansion of the low- and high-temperature forms of BaM{sup IV}(PO{sub 4}){sub 2} compounds (M=Ti, Zr, Hf and Sn)
Crystal structures and phase transitions of SrZr(PO{sub 4}){sub 2}-BaZr(PO{sub 4}){sub 2} solid solutions
Journal Article
·
Sat Oct 15 00:00:00 EDT 2011
· Journal of Solid State Chemistry
·
OSTI ID:21580014
Crystal structure and thermal expansion of the low- and high-temperature forms of BaM{sup IV}(PO{sub 4}){sub 2} compounds (M=Ti, Zr, Hf and Sn)
Journal Article
·
Fri May 15 00:00:00 EDT 2009
· Journal of Solid State Chemistry
·
OSTI ID:21370386
Crystal structures and phase transitions of SrZr(PO{sub 4}){sub 2}-BaZr(PO{sub 4}){sub 2} solid solutions
Journal Article
·
Thu Dec 14 23:00:00 EST 2006
· Journal of Solid State Chemistry
·
OSTI ID:20900928