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Avances en Química 2009
Synthesis and crystal structure analysis of the magnetic ternary compound Mn2GeTe4Keywords: Chalcogenides , Semiconductors , Chemical synthesis , X-ray powder diffraction , Crystal structure Abstract: Samples of the ternary phase Mn2GeTe4 were synthesized by direct fusion using the anneal method. X-ray powder diffraction results indicated that this material crystallizes with orthorhombic symmetry, space group Pnma, and unit cell parameters: a = 13.950(2) , b = 8.115(1) , c = 6.592(1) , V = 746.2(2) 3. The Rietveld refinement converged to the figures of merit Rp = 6.9%, Rwp = 8.6%, Rexp = 5.6% and 2 = 2.4. Mn2GeTe4 is the first telluride of the II2-IV-VI4 family that crystallizes with olivine-type structure.
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