Structure and magnetic properties of Ca14MnP11

Hyungrak Kim, Susan M. Kauzlarich

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

The compound Ca14MnP11 crystallizes in the Ca 14AlSb11 structure type with the tetragonal space group I41/acd (Z=8) and lattice parameters of a=15.3255(7)Å, c=20.7565(9) at 90 K. The structure consists of MnP4 9- tetrahedron, P 3 7- trimer, 4 P3- isolated anions and 14 Ca2+ cations. Similar to other compounds of this structure type containing phosphorous, the P3 7- trimer has a central P atom that is best modeled in the structure as being equally split between two sites. In addition, there is no additional distortion of the manganese-containing tetrahedron compared with the main group analog, Ca 14GaP11, suggesting that the Mn oxidation state is Mn 2+. Temperature-dependent magnetic susceptibility shows that the compound is paramagnetic over the entire temperature range measured (2-300 K). The data can be fit with a modified Curie-Weiss law and provide an effective magnetic moment of 5.80 (2) B.M. with a Weiss constant of -2.13(2) K and χ0=-9(1)×1-5emu/mol. This moment is significantly higher than those measured for any of the Mn-containing analogs and is consistent with Mn 2+. This result will be discussed in light of the electron counting scheme for Mn compounds of the Ca14AlSb11 structure-type.

Original languageEnglish (US)
Pages (from-to)1935-1939
Number of pages5
JournalJournal of Solid State Chemistry
Volume178
Issue number6
DOIs
StatePublished - Jun 2005

Keywords

  • CaAlSb structure type
  • Magnetic material
  • Magnetic Zintl phase
  • Synthesis of new compound
  • Zintl compound

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

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