CHARACTERIZATION AND CRYSTAL STRUCTURE OF A NEW LAYERED CADMIUM DIPHOSPHATE: KCdHP2O7•2H2O

被引：0

作者：

Kouass, S. ^{[1
]}

Selmi, A. ^{[2
,3
]}

Chebbi, H. ^{[4
,5
]}

Guesmi, A. ^{[5
,6
]}

机构：

[1] Inst Natl Rech & Anal Physicochim Sidi Thabet, Lab Mat Utiles, Tunis 2020, Tunisia

[2] Univ Gafsa, Fac Sci, Unite Rech Mat Energie & Energies Renouvelables M, Gafsa 2112, Tunisia

[3] Univ Carthage, Fac Sci Bizerte, Lab Chim Mat, Zarzouna 7021, Bizerte, Tunisia

[4] Univ Tunis, Inst Preparatoire Etud Ingn Tunis, Rue Jawaher Lel Nehru, Tunis 1089, Tunisia

[5] Univ Tunis El Manar, Fac Sci, Lab Mat Cristallochim & Thermodinam Appl, El Manar 2, Tunis 2092, Tunisia

[6] Al Baha Univ, Fac Sci & Arts Al Mukhwah, Al Mukhwah, Al Baha Region, Saudi Arabia

来源：

JOURNAL OF STRUCTURAL CHEMISTRY | 2016年 / 57卷 / 04期

关键词：

crystal structure; cadmium diphosphate; bond-valence-sum; FT-IR; Raman; PHOSPHATE;

D O I：

10.1134/S0022476616040077

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A new potassium cadmium hydrogen diphosphate dihydrate, KCdHP2O7 center dot 2H(2)0 (1), has been synthesized by slow evaporation at room temperature and characterized by FT-IR, Raman, TG-DTA, and single crystal X-ray diffraction. Compound (1) crystallizes in the orthorhombic Pcmn space group with the unit cell parameters a= 6.5814(8) angstrom, b = 7.9428(9) angstrom, c = 15.961(6) angstrom, V 834.4(3) angstrom(3) and Z = 4. Its structure consists of polyhedral layers parallel to the ab plane where each CdO6 octahedron (m position) shares four edges with three different diphosphate groups. In the Cd octahedron, two oxygen atoms residing in (m) special positions belong to coordinated water molecules. These layers are joint by K+ cations (4c Wyckoff position) and hydrogen bonds, leading thus to a two-dimensional framework. The structural model is supported by the bond-valence-sum validation tool as calculated valences are close to the formal oxidation numbers.

引用

页码：679 / 683

页数：5

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