Structural characterization of SmMn2GeO7 single microcrystals by electron microscopy

Acta Crystallogr B. 2005 Feb;61(Pt 1):11-6. doi: 10.1107/S0108768104027673. Epub 2005 Jan 19.

Abstract

Single microcrystals of the new compound samarium dimanganese germanium oxide, SmMn2GeO7, were grown using the flux method in a double spherical mirror furnace (DSMF). The micrometric crystals were observed and chemically analysed with scanning electron microscopy (SEM) and X-ray energy dispersive spectroscopy (EDX). The structural characterization and chemical analysis of these crystals were also carried out using transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM), together with electron-energy-loss spectroscopy (EELS). We found that the new quaternary compound crystallizes in the orthorhombic system with the point group mmm (D2h), space group Immm (No. 71) and cell parameters a=8.30 (10), b=8.18 (10), c=8.22 (10) A and V=558.76 A3.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Crystallography / methods
  • Germanium / chemistry*
  • Manganese / chemistry*
  • Microscopy, Electron / methods*
  • Models, Molecular
  • Molecular Structure
  • Oxygen / chemistry*
  • Samarium / chemistry*

Substances

  • Germanium
  • Samarium
  • Manganese
  • Oxygen