Crystal structure refinement of sahlinite, Pb14(AsO4)2O9Cl4

被引：23
作者：
Bonaccorsi, E [1 ]
Pasero, M [1 ]
机构：
[1] CNR, IGG, I-56126 Pisa, Italy
来源：
MINERALOGICAL MAGAZINE | 2003年 / 67卷 / 01期
关键词：
sahlinite; crystal structure; synchrotron data; lone-pair effect; Langban (Sweden);
D O I：
10.1180/0026461036710080
中图分类号：
P57 [矿物学];
学科分类号：
070901 ;
摘要：
The crystal structure of sahlinite [Pb-14(AsO4)(2)O9Cl4] from Langban (Sweden) has been refined up to R = 0.071 using single-crystal diffraction data collected at the Elettra synchrotron facility. Sahlinite is monoclinic, space group C2/c, with a = 12.704(4), b = 22.576(5), c = 11.287(4) Angstrom, beta = 118.37(3)degrees. Sahlinite is isostructural with kombatite, its vanadium counterpart. Both are derivatives of the litharge form of PbO. In the structure of sahlinite there are seven independent Pb atoms, which are linked to Cl and/or 0 atoms, with coordination number ranging from V to VIII. The coordination polyhedra are irregularly shaped, due to the 6s(2) lone-pair effect displayed by Ph2+.
引用
收藏
页码：15 / 21
页数：7
相关论文
共 21 条
[1]   2ND-ORDER PHASE-TRANSITION IN PBO AND SNO AT HIGH-PRESSURE - IMPLICATIONS FOR THE LITHARGE-MASSICOT PHASE-TRANSFORMATION [J].
ADAMS, DM ;
CHRISTY, AG ;
HAINES, J ;
CLARK, SM .
PHYSICAL REVIEW B, 1992, 46 (18) :11358-11368
[2]  
Aminoff G., 1934, GEOL FOREN STOCKH FO, V56, P493
[3]   AN EMPIRICAL CORRECTION FOR ABSORPTION ANISOTROPY [J].
BLESSING, RH .
ACTA CRYSTALLOGRAPHICA SECTION A, 1995, 51 :33-38
[4]   BOND-VALENCE PARAMETERS FOR SOLIDS [J].
BRESE, NE ;
OKEEFFE, M .
ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1991, 47 :192-197
[5]  
COOPER M, 1994, AM MINERAL, V79, P550
[6]  
Dunn P.J., 1991, Mineral. Rec, V22, P421
[7]  
Farrugia L. J., 1999, J. Appl. Crystallogr, V32, P837, DOI [DOI 10.1107/S0021889899006020, 10.1107/S0021889899006020]
[8]   RIETVELD ANALYSIS OF THE STRUCTURE OF PB(1-X)TI(X)O(1+X) BY NEUTRON-DIFFRACTION [J].
GARNIER, P ;
MOREAU, J ;
GAVARRI, JR .
MATERIALS RESEARCH BULLETIN, 1990, 25 (08) :979-986
[9]  
Holtstam D., 1999, LANGBAN MINES THEIR
[10]   Are the compressive effects of encapsulation an artifact of the bond valence parameters? [J].
Krivovichev, SV ;
Brown, ID .
ZEITSCHRIFT FUR KRISTALLOGRAPHIE, 2001, 216 (05) :245-247
123