Browsing
     by title


0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

or enter first few letters:   
OK
See detailCryptospores and spores from the Ordovician to the Llandovery. A review
Steemans, Philippe ULg

in Acta Universitatis Carolinae. Geologica (1999), (1/2), 271--274

Detailed reference viewed: 13 (1 ULg)
Full Text
Peer Reviewed
See detailCryptospores and trilete spores from the Llandovery, Nuayyim-2 Borehole, Saudi Arabia
Steemans, Philippe ULg; Higgs, K. T.; Wellman, C. H.

Conference (2000)

Detailed reference viewed: 49 (6 ULg)
Full Text
Peer Reviewed
See detailCrystal chemistry and geothermometric applications of primary pegmatite phosphates.
Hatert, Frédéric ULg

in PEG2013 – 6th International Symposium on Granitic Pegmatites, Abstract book (2013)

Detailed reference viewed: 8 (0 ULg)
Full Text
Peer Reviewed
See detailCrystal chemistry of a near end-member triplite, Mn2+2(PO4)F, from Codera valley (Sondrio province, Central Alps, Italy)
Vignola, P; Gatta, D; Hatert, Frédéric ULg et al

in PEG2013 – 6th International Symposium on Granitic Pegmatites, Abstract book (2013)

Detailed reference viewed: 17 (0 ULg)
Full Text
Peer Reviewed
See detailCrystal chemistry of lithium in pegmatite phosphates: A SIMS investigation of natural and synthetic samples
Hatert, Frédéric ULg; Ottolini, Luisa; Keller, Paul et al

in Estudios Geologicos (2009), 19(2), 131-134

Detailed reference viewed: 16 (2 ULg)
Full Text
Peer Reviewed
See detailThe crystal chemistry of lithium in the alluaudite structure
Hatert, Frédéric ULg

Conference (2003)

Detailed reference viewed: 10 (0 ULg)
Full Text
Peer Reviewed
See detailThe crystal chemistry of lithium in the alluaudite structure: a study of the (Na1-xLix)(1.5)Mn1.5Fe1.5(PO4)(3) solid solution (x=0 to 1)
Hatert, Frédéric ULg

in Mineralogy and Petrology (2004), 81(3-4), 205-217

Phosphates of compositions (Na1-xLix)(1.5)Mn1.5Fe1.5(PO4)(3) were synthesized by solid state reactions in air, and pure alluaudite-type compounds were obtained for x = 0.00, 0.25, and 0.50. Rietveld ... [more ▼]

Phosphates of compositions (Na1-xLix)(1.5)Mn1.5Fe1.5(PO4)(3) were synthesized by solid state reactions in air, and pure alluaudite-type compounds were obtained for x = 0.00, 0.25, and 0.50. Rietveld refinements of X-ray powder diffraction data indicate the occurrence of Mn2+ in the M(1) site, and of Fe3+ and Mn2+ in the M(2) site. For x = 0.25 and 0.50, A(1) is occupied by Li+ and Na+, whereas A(2)' is occupied by Na+ and vacancies. A careful examination of the number of electrons occurring in the A sites of the alluaudite-type compounds (Na1-xLix)MnFe2(PO4)(3) and (Na1-xLix) CdIn2(PO4)(3) confirms that lithium occupies only the A(1) crystallographic site of the alluaudite structure. [less ▲]

Detailed reference viewed: 11 (1 ULg)
Full Text
Peer Reviewed
See detailThe crystal chemistry of lithium in the alluaudite structure: A study of the (Na1-xLix)Cdln(2) (PO4)(3) the solid solution (x=0 to 1)
Hatert, Frédéric ULg; Antenucci, Diano ULg; Fransolet, André-Mathieu ULg et al

in Journal of Solid State Chemistry (2002), 163(1), 194-201

Several compounds of the (Na1-xLix)CdIn2(PO4)(3) solid solution were synthesized by a solid-state reaction in air, and pure alluaudite-like compounds were obtained for x = 0.00, 0.25, and 0.50. X-ray ... [more ▼]

Several compounds of the (Na1-xLix)CdIn2(PO4)(3) solid solution were synthesized by a solid-state reaction in air, and pure alluaudite-like compounds were obtained for x = 0.00, 0.25, and 0.50. X-ray Rietveld refinements indicate the occurrence of Cd2+ in the M(1) site, and of In3+ in the M(2) site of the alluaudite structure. This non-disordered cationic distribution is confirmed by the sharpness of the infrared absorption bands. The distribution of Na+ and Li+ on the A(1) and A(2)' crystallographic sites cannot be accurately assessed by the Rietvled method, probably because the electronic densities involved in the Na+ --> Li+ substitution are very small. A comparison with the synthetic alluaudite-like compounds, (Na1-xLix)MnFe2(PO4)(3), indicates the influence of the cations occupying the M(1) and M(2) sites on the coordination polyhedra morphologies of the A(1) and A(2)' crystallographic sites. (C) 2002 Elsevier Science. [less ▲]

Detailed reference viewed: 31 (0 ULg)
Full Text
Peer Reviewed
See detailCrystal chemistry of natural and synthetic fillowite-type phosphates
Hatert, Frédéric ULg; Keller, Paul; Grew, Ed et al

Conference (2008)

Detailed reference viewed: 9 (1 ULg)
Full Text
Peer Reviewed
See detailThe crystal chemistry of olivine-type phosphates
Hatert, Frédéric ULg; Ottolini, Luisa; Fontan, François et al

Conference (2011)

Detailed reference viewed: 10 (2 ULg)
Full Text
Peer Reviewed
See detailCrystal Chemistry of Synthetic M(2+)Be2P2O8 (M(2+) = Ca, Sr, Pb, Ba) Beryllophosphates
Dal Bo, Fabrice ULg; Hatert, Frédéric ULg; Baijot, Maxime ULg

in Canadian Mineralogist (2014), 52(2), 337-350

Detailed reference viewed: 9 (2 ULg)
Full Text
Peer Reviewed
See detailCrystal chemistry of the hydrothermally synthesized Na-2(Mn1-xFex2+)(2)Fe3+(PO4)(3) alluaudite-type solid solution
Hatert, Frédéric ULg; Rebbouh, Leila; Hermann, Raphaël P. et al

in American Mineralogist (2005), 90(4), 653-662

Several compounds of the Na-2(Mn1-xFex2x)(2)Fe3+(PO4)(3) solid solition have been hydrothermally synthesized at 400 degrees C and 1 kbar; pure alluaudite-like compounds have been obtained for x = 0.00, 0 ... [more ▼]

Several compounds of the Na-2(Mn1-xFex2x)(2)Fe3+(PO4)(3) solid solition have been hydrothermally synthesized at 400 degrees C and 1 kbar; pure alluaudite-like compounds have been obtained for x = 0.00, 0.25, 0.50, 0.75, and 1.00. Rietveld refinements of the powder X-ray diffraction patterns indicate the presence of Na+ at the Al and A2' sites, Mn2+ and Fe2+ at the M1 site, and Mn2+, Fe2+, and Fe3+ at the M2 site. The presence of small amounts of Na+ at the M1 site and Mn2+ at the Al site indicates a partially disordered distribution of these cations. An excellent linear correlation has been established between the M1-M2 distance and the energy of the infrared band attributed to the M2+-O vibrations. The Mossbauer spectra, measured between 85 and 295 K, were analyzed in terms of a model which includes the next-nearest neighbor interactions at the M2 and M1 crystallographic sites. Fe2+ and Fe3+ isomer shifts are typical of the alluaudite structure and exhibit the expected second-order Doppler shift. The derived iron vibrating masses and Mossbauer lattice temperatures are within the range of values expected for iron cations in all octahedral environment. The Fe2+ and Fe3+ quadrupole splittings are typical of the alluaudite structure, and the temperature dependence of the Fe2+ quadrupole splitting was fit with the Ingalls model, which yielded a ground state orbital splitting of ca. 460 to 735 cm(-1) for the Fe2+ sites. The isomer shifts and quadrupole splittings of Fe2+ at the M1 site are larger than those of Fe2+ at M2, indicating that the M1 site is both larger and more distorted than the M2 site. [less ▲]

Detailed reference viewed: 42 (0 ULg)