title: Structural characterization of SmMn2GeO7 single microcrystals by electron microscopy.
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.
authors.affiliation: Instituto de Física, UNAM Apartado Postal 20-364, 01000 México DF, Mexico. erickj@fisica.unam.mx
authors.forename: E A
authors.initials: EA
authors.lastname: Juarez-Arellano
authors.forename: J M
authors.initials: JM
authors.lastname: Ochoa
authors.forename: L
authors.initials: L
authors.lastname: Bucio
authors.forename: J
authors.initials: J
authors.lastname: Reyes-Gasga
authors.forename: E
authors.initials: E
authors.lastname: Orozco
mesh_terms: D003461:Crystallography / Q000379:methods; D005857:Germanium / Q000737:chemistry*; D008345:Manganese / Q000737:chemistry*; D008854:Microscopy, Electron / Q000379:methods*; D008958:Models, Molecular; D015394:Molecular Structure; D010100:Oxygen / Q000737:chemistry*; D012493:Samarium / Q000737:chemistry*
chemical_list: D005857:Germanium; D012493:Samarium; D008345:Manganese; D010100:Oxygen