Growth of olivine single crystals by the micro-pulling-down method by S. Ganschow and D. Klimm

Crystal Research and Technology

Cryst. Res. Technol. 40, 359 (2005) - Abstract -

Growth of olivine single crystals by the micro-pulling-down method

S. Ganschow and D. Klimm

Institute for Crystal Growth, Max-Born-Str. 2, 12489 Berlin, Germany

Keywords	olivine, crystal growth, solid solutions, growth atmosphere, segregation
PACS	77.84.Bw, 81.10.Fq, 61.72.Qq, 64.75.+g, 81.30.Mh, 82.60.Hc
DOI	10.1002/crat.200410351

Olivine, (Mg_1-xFe_x)₂SiO₄, crystals have been grown by the micro-pulling-down method. The crystals consisted of a homogeneous core and a surrounding peripheral rim with increased fayalite concentration and numerous second phase inclusions, mainly magnetite. The formation of magnetite could be successfully retarded by using an adapted atmosphere consisting of 5 vol% CO + 10 vol% CO₂ + 85 vol% Ar. This mixture yields an oxygen pressure well inside the predominance field of FeO over a wide temperature range.

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