Premium
Modulated crystal structure of Pr 2 SbO 2
Author(s) -
Magdysyuk Oxana V.,
Nuss Jürgen,
Jansen Martin
Publication year - 2013
Publication title -
acta crystallographica section b
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.604
H-Index - 33
eISSN - 2052-5206
pISSN - 2052-5192
DOI - 10.1107/s2052519213029436
Subject(s) - orthorhombic crystal system , supercell , crystallography , superspace , crystal (programming language) , physics , crystal structure , group (periodic table) , reciprocal lattice , chemistry , diffraction , optics , mathematical physics , quantum mechanics , computer science , thunderstorm , supersymmetry , programming language , meteorology
The crystal structure of commensurately modulated Pr 2 SbO 2 was solved in the orthorhombic superspace group Immm (0β0)000, q = 3/4 b *, a = 13.5790 (15), b = 3.9818 (18), c = 4.0041 (18) Å ( T = 40 K) from a crystal twinned by reticular pseudomerohedry applying the twin law (1 0 0, 0 0 1, 0 −1 0), corresponding to a rotation by 90° along the reciprocal a axis. The formation of Zintl‐type Sb 2− –Sb 2− dumbbells in Pr 2 3+ Sb 2− O 2 2− is considered to be accountable for its semiconducting properties, as observed previously. The space group for the three‐dimensional commensurate supercell a = 13.5790 (15), b = 15.9272 (18), c = 4.0041 (18) Å ( T = 40 K) is Pmnm .