Ba4Mg[Si2N6], Ba3Ca 2[Si2N6] and Ba1.6Sr 3.4[Si2N6]-Quaternary barium alkaline-earth silicon nitrides containing isolated nitridosilicate anions of [Si 2N6]10-

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Ba4Mg[Si2N6], Ba3Ca 2[Si2N6], and Ba1.6Sr 3.4[Si2N6] were synthesized by heating Ba, AE (=Mg, Ca, and Sr), Si, NaN3 and Na at 900 °C. The crystal structures of these compounds consist of alkaline-earth metal cations and edge-sharing SiN4 tetrahedra of isolated nitridosilicate anions [Si2N6]10-. Ba4Mg[Si 2N6] crystallizes in a new orthorhombic structure type, space group F d d d (No. 70-2), a = 7.9095(3) Å, b = 11.2972(5) Å, c = 20.4009(12) Å, and Z = 8. Mg2+ cations are planar-rectangularly coordinated by four nitrogen atoms. The monoclinic crystal structures (C2/c (No. 15), Z = 4) of Ba3Ca2[Si 2N6] (a = 10.0962(4) Å, b = 6.7868(3) Å, c = 13.3249(5) Å, β = 101.7070(13)°) and Ba1.6Sr 3.4[Si2N6] (a = 10.2406(5) Å, b = 6.6715(3) Å, c = 13.5166(8) Å, β = 100.274(2)°) are isotypic with Ca5[Si2N6].

Original languageEnglish
Pages (from-to)320-324
Number of pages5
JournalJournal of Alloys and Compounds
Volume555
DOIs
Publication statusPublished - 2013 Apr 5

Keywords

  • Crystal structure
  • Na flux
  • Nitride materials
  • Nitridosilicates
  • Single crystal
  • X-ray diffraction

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Ba<sub>4</sub>Mg[Si<sub>2</sub>N<sub>6</sub>], Ba<sub>3</sub>Ca <sub>2</sub>[Si<sub>2</sub>N<sub>6</sub>] and Ba<sub>1.6</sub>Sr <sub>3.4</sub>[Si<sub>2</sub>N<sub>6</sub>]-Quaternary barium alkaline-earth silicon nitrides containing isolated nitridosilicate anions of [Si <sub>2</sub>N<sub>6</sub>]<sup>10-</sup>'. Together they form a unique fingerprint.

Cite this