HYDROTHERMAL SYNTHESIS, CRYSTAL-STRUCTURE AND IONIC-CONDUCTIVITY OF AG2VO2PO4 - A NEW LAYERED PHOSPHATE OF VANADIUM(V)
HYDROTHERMAL SYNTHESIS, CRYSTAL-STRUCTURE AND IONIC-CONDUCTIVITY OF AG2VO2PO4 - A NEW LAYERED PHOSPHATE OF VANADIUM(V)
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DOI：
10.1039/dt9930001525
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发表时间：
1993-05-21
期刊：
影响因子：
--
通讯作者：
LII, KH
中科院分区：
文献类型：
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作者：
KANG, HY;WANG, SL;LII, KH
采用水热法在230 ℃合成了一种新的二氧钒磷酸盐Ag 2 VO 2 PO 4，并用X射线单晶衍射对其进行了表征。该化合物在单斜空间群C2/m中结晶，其中a = 12.431（3），B = 6.298（1），c = 6.300（2）埃，β = 90.38（2）度，Z = 4和R = 0.026。该结构由边缘共享的VO 6八面体和PO 4四面体的二聚体层组成，平行于（001）晶面延伸，层间有银离子。讨论了与BaVO_2PO_4的结构关系。对Ag 2 VO 2 PO 4的交流阻抗测量表明，在375 ℃下的离子电导率为1 × 10（-4）Ω-1 cm-1，活化能为47 kJ mol-1。
A new dioxovanadium(V) phosphate, Ag2VO2PO4, has been synthesised hydrothermally at 230-degrees-C and characterized by single-crystal X-ray diffraction. The compound crystallizes in the monoclinic space group C2/m with a = 12.431(3), b = 6.298(1), c = 6.300(2) angstrom, beta = 90.38(2)degrees, Z = 4 and R = 0.026. The structure consists of layers of dimers of edge-sharing VO6 octahedra and PO4 tetrahedra, extending parallel to the (001) crystallographic plane with silver ions between the layers. The structural relationship with BaVO2PO4 is discussed. Alternating current impedance measurements on Ag2VO2PO4 indicate that the ionic conductivity at 375-degrees-C is 1 x 10(-4) OMEGA-1 cm-1 with an activation energy of 47 kJ mol-1.