Accession Number:

ADA222274

Title:

Synthesis, Structure, and Properties of a New Ternary Metal Nitride, Ca3CrN3

Descriptive Note:

Technical rept. no. 7, 1989-1990,

Corporate Author:

CORNELL UNIV ITHACA NY DEPT OF CHEMISTRY

Report Date:

1990-04-30

Pagination or Media Count:

21.0

Abstract:

We have synthesized a new ternary nitride, Ca3CrN3 calcium chromium nitride, from the binary nitrides at high temperature. The refined structure was solved in the Cmcm space group with lattice constants a8.5032, b10. 2842, c5.0321, and R3.9, Rw3.9. This new structure type consists of sheets of CrN36- planar triangular units and calcium ions. Ca3CrN3 is insulating and paramagnetic with Cr3 in the low spin state. This is the first unambiguous example of low spin Cr3. Larger than expected antiferromagnetic interactions produce a maximum in the magnetic susceptibility at 245K, even though the shortest Cr-Cr distance is 4.73A. jg

Subject Categories:

  • Inorganic Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE