TY - JOUR
T1 - Two new acidic diphosphates Rb2M(H2P2O7)2·2H2O (M = Zn and Mg)
T2 - Crystal structures and vibrational study
AU - Essehli, Rachid
AU - El Bali, Brahim
AU - Lachkar, Mohammed
AU - Cruciani, Giuseppe
PY - 2010/3/4
Y1 - 2010/3/4
N2 - Two new complex diphosphates Rb2M(H2P2O7)2·2H2O [M = Zn (I), Mg (II)], have been synthesized using wet chemistry. Their crystals have been isolated and characterized by X-ray diffraction, FTIR and micro-Raman techniques. Both compounds crystallize in the triclinic system, S.G. P-1, Z = 1 and following parameters (Å,°), [6.9573(1), 7.3615(1), 7.7938(1), 81.851(1), 70.622(1), 86.263(1), R1 / w R2 = 0.0315 / 0.1083 for (I) and 6.9546(1), 7.3752(1), 7.8117(1), 81.986(1), 70.275(1), 85.988(1), R1 / w R2 = 0.0275 / 0.0865 for (II)]. The crystal packing in (I) and (II) consists in a three-dimensional network made by layers, parallel to ac-plane. H2P2O72- shows bent eclipsed conformation and the M2+ ion lies on inversion centre. IR and Raman spectra confirm the bent geometry of the POP bridge angle.
AB - Two new complex diphosphates Rb2M(H2P2O7)2·2H2O [M = Zn (I), Mg (II)], have been synthesized using wet chemistry. Their crystals have been isolated and characterized by X-ray diffraction, FTIR and micro-Raman techniques. Both compounds crystallize in the triclinic system, S.G. P-1, Z = 1 and following parameters (Å,°), [6.9573(1), 7.3615(1), 7.7938(1), 81.851(1), 70.622(1), 86.263(1), R1 / w R2 = 0.0315 / 0.1083 for (I) and 6.9546(1), 7.3752(1), 7.8117(1), 81.986(1), 70.275(1), 85.988(1), R1 / w R2 = 0.0275 / 0.0865 for (II)]. The crystal packing in (I) and (II) consists in a three-dimensional network made by layers, parallel to ac-plane. H2P2O72- shows bent eclipsed conformation and the M2+ ion lies on inversion centre. IR and Raman spectra confirm the bent geometry of the POP bridge angle.
KW - Acidic diphosphates
KW - Crystal structure
KW - IR and micro-Raman spectroscopies
KW - X-ray diffraction
UR - http://www.scopus.com/inward/record.url?scp=76549124709&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2009.11.095
DO - 10.1016/j.jallcom.2009.11.095
M3 - Article
AN - SCOPUS:76549124709
SN - 0925-8388
VL - 492
SP - 358
EP - 362
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
IS - 1-2
ER -