Synthesis and characterization of Ca2CoTaO6, a new monoclinically distorted double perovskite

• Main Authors: Araceli Elisabet Lavat, Enrique José Baran
• Format: Article
• Language: English
• Published: Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) 2011-12-01
• Series: Materials Research
• Subjects: Ca2CoTaO6; double perovskite; X-ray diffraction; IR spectrum
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392011000400008

The new Ca2CoTaO6 double perovskite has been synthesized by a conventional solid state reaction and its unit cell parameters determined by X-ray powder diffractometry. It crystallizes in the monoclinic space group P2(1)/n. The unit cell parameters are: a = 5.507(2) Å; b = 5.564(3) Å; c = 7.798(3) Å; β = 89.99(4)° and Z = 2. The IR spectrum of the material was recorded and is briefly discussed. Some comparisons with Ca2CoNbO6 and other isostructural perovskites are also performed.