Solid Products of the Reaction of Lanthanum(III) Nitrate
with Potassium Hexa(isothiocyanato)chromate(III)
in an Aqueous Solution: X-ray Diffraction Analysis

E. V. Cherkasova^a, E. V. Peresypkina^b, A. V. Virovets^b, E. S. Tatarinova^a, and T. G. Cherkasova^a

^a Kuzbass State Technical University, Kemerovo, Russia

^b Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences,
pr. Akademika, Lavrent’eva 3, Novosibirsk, 630090 Russia

e-mail: ctg.htnv@kuzstu.ru

Received May 4, 2007

Abstract—The X-ray diffraction study of the crystalline products of the reaction of equimolar amounts of
La(NO₃)₃ and K₃[Cr(NCS)₆] in an aqueous medium showed the presence of three crystalline substances: unre-
acted K₃[Cr(NCS)₆] · xH₂O, K₂La(NO₃)₅(H₂O)₂, and a new compound with the composition
K[La(H₂O)₈(NO₃)][Cr(NCS)₆] · 2H₂O, which crystallizes in the monoclinic crystal system, space group P2₁/n,
a= 12.8759(2) Å, b = 13.0454(3) Å, c = 17.7848(3) Å, = 102.6840(10), V = 2914.43(9) ³, Z = 4, _calcd =
1.870 g/cm³. The coordination polyhedron of the lanthanum atom is a square antiprism with two caps at the
square faces, and the coordination environment of the chromium atom is an almost regular octahedron.

DOI: 10.1134/S0036023608070218

Pleiades Publishing home page | journal home page | top

If you have any problems with this server, contact webmaster.