Open AccessCRYSTAL STRUCTURE OF POTASSIUM LANTHANUM METAPHOSPHATE
Author(s) -
Yuan Lin,
Ninghai Hu,
Zhou Qinglian,
Shuzhen Liu
Publication year - 1983
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.32.675
Subject(s) - metaphosphate , dodecahedron , crystallography , monoclinic crystal system , lanthanum , crystal structure , materials science , potassium , tetrahedron , molecule , hydrate , chemistry , inorganic chemistry , phosphate , organic chemistry , metallurgy
The crystal of potassium lanthanum metaphosphate with composition KLa[PO3]4 belongs to monoclinic system. The space gr oup is P21 with lattice parameters α= 8.106(3)?, b= 8.551 (2)?, c = 7.326(3)?, β = 92.18(6)°. Two molecules are contained in the unit cell. A fullmatrix, least square refinement gave R=0.061, Rw = 0.062 for 1026 independent reflections. The basic structural units are helical ribbons, (PO3)n, formed by cornersharing tetrahedra of PO4. The LaO8 dodecahedra are isolated without sharing any O atom with each other, and K atom locate on the center of irregular interstitial polyhedra. The shorhest La-La distance is 7.063?.