The type IV polymorph of KEu(PO3)4

被引：3

作者：

Oudahmane, Abdelghani ^{[2
]}

Daoud, Mohamed ^{[2
]}

Tanouti, Boumediene ^{[2
]}

Avignant, Daniel ^{[1
]}

Zambon, Daniel ^{[1
]}

机构：

[1] Univ Blaise Pascal, Lab Mat Inorgan, CNRS, UMR 6002, F-63177 Aubiere, France

[2] Univ Cadi Ayyad, Lab Physicochim Mat & Environm, Fac Sci Semlalia, Dept Chim, Marrakech 40000, Morocco

来源：

ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE | 2009年 / 65卷

关键词：

CRYSTAL-STRUCTURE;

D O I：

10.1107/S1600536809048788

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Single crystals of KEu(PO3)(4), potassium europium(III) polyphosphate, were obtained by solid-state reactions. This monoclinic form is the second polymorph described for this composition and belongs to type IV of long-chain polyphosphates with general formula A(I)B(III)(PO3)(4). It is isotypic with its KEr(PO3)(4) and KDy(PO3)(4) homologues. The crystal structure is built of infinite helical chains of corner-sharing PO4 tetrahedra with a repeating unit of eight tetrahedra. These chains are further linked by isolated EuO8 square antiprisms, forming a three-dimensional framework. The K+ ions are located in pseudo-hexagonal channels running along [(2) over bar 01] and are surrounded by nine O atoms in a distorted environment.

引用

页码：I91 / U65

页数：11

共 24 条

[1] Influence of the structure of the MEu(PO 3) 4 crystals on their luminescent properties
Barsukov I.V.
Syt'ko V.V.
Umreiko D.S.
[J]. Journal of Applied Spectroscopy, 2004, 71 (5) : 676 - 680
[2] BENZARKOUNA E, 2006, ACTA CRYSTALLOGR C, V62, P64
[3] Brandenburg K., 1999, DIAMOND
[4] Bruker, 2008, SADABS APEX2 SAINT
[5] The type IV polymorph of KDy(PO3)4
Chehimi-Moumen, Fathia
Ferid, Mokhtar
[J]. ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE, 2007, 63 : I129 - I130
[6] Dago A. M., 1980, Soviet Physics - Doklady, V25, P231
[7] Durif A., 1995, CRYSTAL CHEM CONDENS
[8] RbGd(PO3)4
Ettis, Hasna
Naili, Houcine
Mhiri, Tahar
[J]. ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS, 2006, 62 : I166 - I168
[9] HORCHANI K, 2004, J PHYS IV, V122, P123
[10] A new polymorph of CsPr(PO3)4
Horchani-Naifer, Karima
Ferid, Mokhtar
[J]. ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE, 2007, 63 : I131 - I132

← 1 2 3 →