Structure of PbIISnIV(PO4)2: Stereochemical Activity of the Lead II Lone Pair

BaAnIV(PO4)2 (AnIV = Th, Np) – A New Family of Layered Double Phosphates

“…At last, recently discovered SrSn(PO 4 ) 2 (space group C2/c) appears as a distorted modification of yavapaiite, [42] while SrZr(PO 4 ) 2 (P1) is considered by its discoverers as "probably isostructural with yavapaiite", [43] but in PbSn(PO 4 ) 2 , the 6s 2 lone pair affects strongly the Pb II polyhedron, thus resulting in a unique structure. [44] Having in mind the almost identical ionic radii of the heaviest alkaline earth barium and radium, [30] one could predict that the radium-containing counterparts, RaAn(PO 4 ) 2 , would adopt a similar layered structure as those of BTP and BNP.…”

Crystal Structure of BiZn2PO6. Filiation between Related Compounds

“…The local electric "eld is calculated from electrostatic interactions in the whole crystal using the Ewald's method (18). This formula was recently computerized in the program HYBRIDE at the Laboratorie de Cristallochimie du Solide, University Paris IV (19). The used bismuth polarizability value is 6.12 A s (20).…”

Structural study of polymorphism and thermal behavior of CaZr(PO4)2

“…IV (PO 4 ) 2 compounds (M II = Cd, Ca, Sr, Pb, Ba; M' IV = Ge, Ti, Mo, Sn, Hf, Zr, Pu, Np, U, Th) are subject of intensive research since they are proved to be interesting as ionic conductors, dielectrics, catalysts, ion exchangers, luminescent materials and UV-emitting Xray phosphors [1][2][3][4][5][6][7]. They also find applications in the nuclear cycle, either as host matrices for actinide radwastes or, more recently, as products of the reaction of the spent nuclear fuel with tributyl phosphate during the reprocessing [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22].…”

“…Nevertheless, some compositions exhibit a clearly different crystal structure, like CaZr(PO 4 ) 2 , PbSn(PO 4 ) 2 and SrNp(PO 4 ) 2 [1,29,30]. The structure of CaZr(PO 4 ) 2 was determined for the first time by Fukuda et al from powder diffraction data [31].…”

“…The structure of CaZr(PO 4 ) 2 was determined for the first time by Fukuda et al from powder diffraction data [31]. The structure was found to be orthorhombic (space group P2 1 …”