Synthesis and structural characterization of Na xSi 136 (0 <x ≤ 24) single crystals and low-temperature transport of polycrystalline specimens

Stevce Stefanoski, Christos D. Malliakas, Mercouri G Kanatzidis, George S. Nolas

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Na xSi 136 clathrate-II single crystals with x = 2.9, 5.1, 8.2, and 14.7 were prepared by a two-step process. In the first step, Na 24Si 136 single crystals were grown from the precursor Na 4Si 4 by reaction of the vapor phase with spatially separated graphite in a closed volume. In the second step, the Na 24Si 136 single crystals were subjected to thermal decomposition in a nitrogen atmosphere at 10 Torr and 405 °C. The Na content was controlled by the duration of thermal decomposition. The structural properties were investigated using single-crystal X-ray diffraction and compared with those of single-crystal Na 24Si 136. The quality of the obtained products also allowed for low-temperature transport property measurements on agglomerates of crystals allowing for an investigation into the low-temperature electrical and thermal properties as a function of Na content.

Original languageEnglish
Pages (from-to)8686-8692
Number of pages7
JournalInorganic Chemistry
Volume51
Issue number16
DOIs
Publication statusPublished - Aug 20 2012

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Single crystals
single crystals
synthesis
thermal decomposition
Pyrolysis
Temperature
Graphite
clathrates
Transport properties
Structural properties
Electric properties
Nitrogen
Thermodynamic properties
graphite
thermodynamic properties
transport properties
Vapors
electrical properties
vapor phases
nitrogen

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry

Cite this

Synthesis and structural characterization of Na xSi 136 (0 <x ≤ 24) single crystals and low-temperature transport of polycrystalline specimens. / Stefanoski, Stevce; Malliakas, Christos D.; Kanatzidis, Mercouri G; Nolas, George S.

In: Inorganic Chemistry, Vol. 51, No. 16, 20.08.2012, p. 8686-8692.

Research output: Contribution to journalArticle

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