ChemInform Abstract: PREPARATION AND STUDY OF THE TRIRUTILE PHASE MORH2O6

Abstract

Die durch Festphasen‐ reaktion dargestellte Titelverbindung kristallisiert tetragonal in der Raumgruppe Dfh‐P? /mnm.

Preparation and properties of the systems Fe2−xCrxWO6, Fe2−xRhxWO6, and Cr2−xRhxWO6

“…It has been reported (1-3) that Fe 2 WO 6 crystallizes with the tri-a-PbO 2 structure when prepared at temperatures above 800*C. This phase shows high conductivity as a result of the formation of a small amount of FeWO 4 and its solid solution in Fe 2 WO 6 (3). The existence of both Fe 2+ and Fe3 + is assumed to be the basis for the observed conductivity.…”

“…Cr 2 WO 6 and Rh 2 WO 6 crystallize with the trirutile and the rutile structures, respectively. The magnetic structure of Cr 2 WO 6 derived from neutron diffraction data (4,5) shows antiferromagnetic behavior with a N6el temperature at 69*K. However, bulk susceptibility measurements at elevated temperatures have not been made.…”

“…The magnetic structure of Cr 2 WO 6 derived from neutron diffraction data (4,5) shows antiferromagnetic behavior with a N6el temperature at 69*K. However, bulk susceptibility measurements at elevated temperatures have not been made. In addition, there has been no report concerning the electronic properties of this phase.…”

“…In addition, there has been no report concerning the electronic properties of this phase. Rh 2 WO 6 was first prepared by…”

“…Separate chains are linked together by means of corner sharing. For both Cr 2 WO 6 and Rh 2 WO 6 , these chains contain tungsten and either chromium or rhodium ions. It was the main purpose of this study to measure the crystallographic, magnetic, and electronic properties of these compounds in order to determine if there was an, significant interaction between Cr+ (3d) or in a silica tube (systems Fe 2 x RhxWO 6 and Cr 2 x Rh WO 6) and heated in air at the temperature and time indicated in Table 1.…”