Synthesis and structure of Ba6Mg7F26

被引：12

作者：

Kubel, F ^{[1
]}

Hagemann, H ^{[1
]}

Bill, H ^{[1
]}

机构：

[1] UNIV GENEVA,DEPT CHIM PHYS,CH-1211 GENEVA 4,SWITZERLAND

来源：

ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE | 1997年 / 623卷 / 04期

关键词：

barium magnesium fluorides; X-ray crystallography; Raman spectroscopy;

D O I：

10.1002/zaac.19976230189

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A new compound in the binary phase diagram of BaF2 and MgF2 was synthesized. After Czrochalsky growth of BaMgF4, needle shaped crystals were found on the surface of the cooled residual mass. The compound Ba6Mg7F26 crystallizes in the orthorhombic space group Immm with lattice parameters of a=585.35(4), b=1214.95(7), and c=1511.09(9) pm. The global structure can be described as build up of perovskite like blocks and rutile related parts. Magnesium ions have an octahedral fluoride environment with minimum (maximum) bond distances of 192.1(2) (227.4(3)) pm. Two different barium environments with coordination number (C.N.) of 12 + 1 (Ba1) and 12 (Ba2) were found. The different fluoride ions can have C.N. of 6, 4 or 3 with the nearest metal atoms. Preliminary Raman spectra show significant differences between BaMgF4 and Ba6Mg7F26.

引用

页码：573 / 578

页数：6

共 14 条

[1] HIGH-TEMPERATURE SPECTRAL HOLE-BURNING ON SAMARIUM(II) IN SINGLE-CRYSTALS OF THE LEAD FLUOROHALIDE STRUCTURE FAMILY AND IN THIN-FILMS OF CALCIUM-FLUORIDE [J].

BILL, H ;

JAANISO, R ;

HAGEMANN, H ;

LOVY, D ;

MONNIER, A ;

SCHNIEPER, M .

OPTICAL ENGINEERING, 1995, 34 (08) :2333-2338

[2]

BUKHALOVA GA, 1959, ZH NEORG KHIM+, V4, P1141

[3] STRUCTURE TIDY - A COMPUTER-PROGRAM TO STANDARDIZE CRYSTAL-STRUCTURE DATA [J].

GELATO, LM ;

PARTHE, E .

JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1987, 20 (02) :139-143

[4]

GINGL F, 1997, UNPUB J ALLOYS COMP

[5]

GROS A, 1981, THESIS U LYON 1 FRAN

[6] CRYSTAL STRUCTURE OF PYROELECTRIC PARAMAGNETIC BARIUM MANGANESE FLUORIDE, BAMNF4 [J].

KEVE, ET ;

ABRAHAMS, SC ;

BERNSTEIN, JL .

JOURNAL OF CHEMICAL PHYSICS, 1969, 51 (11) :4928-+

[7] Synthesis and structure of mixed Ba12F19Cl delta Br5-delta crystals [J].

Kubel, F ;

Hagemann, H ;

Bill, H .

ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 1996, 622 (08) :1374-1380

[8] Synthesis and structure of Ba12F19Cl5 [J].

Kubel, F ;

Hagemann, H ;

Bill, H .

ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 1996, 622 (02) :343-347

[9] CRYSTALLOCHEMICAL AND OPTICAL STUDY OF MIXED ALKALINE EARTH-SAMARIUM FLUOROHALIDES OF THE LEAD FLUORIDE CHLORIDE TYPE [J].

KUBEL, F ;

HAGEMANN, H ;

BILL, H .

MATERIALS RESEARCH BULLETIN, 1995, 30 (04) :405-412

[10] MISSYM-1.1 - A FLEXIBLE NEW RELEASE [J].

LEPAGE, Y .

JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1988, 21 :983-984

← 1 2 →