TY - JOUR
T1 - Synthesis and absorption spectra of large homogeneous single crystals of forsterite doped with manganese
AU - Kanazawa, H.
AU - Ito, K.
AU - Sato, H.
AU - Kumatoriya, M.
AU - Miyazaki, K.
AU - Uehara, S.
AU - Tsuda, H.
AU - Kuzawa, K.
AU - Kawame, N.
AU - Kitazawa, T.
AU - Tamada, O.
AU - Boisen, M. B.
AU - Takei, H.
N1 - Funding Information:
The authors thank the Material Design and Characterization Laboratory, the Institute for Solid State Physics of the University of Tokyo, for the Czochralski-pulling facilities. This work was supported by grants from JSPS (C15540459), and from the Earthquake Research Institute of the University of Tokyo (2005-A-16 and 2006-A-14). We acknowledge anonymous reviewers for thoughtful suggestions and comments.
PY - 2007/6/15
Y1 - 2007/6/15
N2 - In synthetic single crystals of the olivine group, a strong compositional zoning along the growth direction has often been observed. Here we have synthesized large homogeneous single crystals of forsterite doped with manganese (50 mm×150-200 mm) by the Czochralski method using a large volume crucible, at ∼1950 °C in an N2 atmosphere. The size of the crystals in this study is the largest reported. The homogeneous parts of as-grown crystals with the compositions of (Mn0.004Mg0.996)2SiO4 and (Mn0.011Mg0.989)2SiO4 are as large as 20×20×50 mm3 [x=0.0040±0.0004 in (MnxMg1-x)2SiO4] and 12×12×30 mm3 [x=0.011±0.001], respectively. The crystals were prepared to allow for accurate measurements of physical properties and their anisotropies of pure Mn bearing forsterite, to extract the effect of Mn itself, ultimately for the study of the Earth's mantle. The polarized absorption spectra were measured for an evidence of measured anisotropy, and the clear pleochroism was observed.
AB - In synthetic single crystals of the olivine group, a strong compositional zoning along the growth direction has often been observed. Here we have synthesized large homogeneous single crystals of forsterite doped with manganese (50 mm×150-200 mm) by the Czochralski method using a large volume crucible, at ∼1950 °C in an N2 atmosphere. The size of the crystals in this study is the largest reported. The homogeneous parts of as-grown crystals with the compositions of (Mn0.004Mg0.996)2SiO4 and (Mn0.011Mg0.989)2SiO4 are as large as 20×20×50 mm3 [x=0.0040±0.0004 in (MnxMg1-x)2SiO4] and 12×12×30 mm3 [x=0.011±0.001], respectively. The crystals were prepared to allow for accurate measurements of physical properties and their anisotropies of pure Mn bearing forsterite, to extract the effect of Mn itself, ultimately for the study of the Earth's mantle. The polarized absorption spectra were measured for an evidence of measured anisotropy, and the clear pleochroism was observed.
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U2 - 10.1016/j.jcrysgro.2007.02.038
DO - 10.1016/j.jcrysgro.2007.02.038
M3 - Article
AN - SCOPUS:34248561235
SN - 0022-0248
VL - 304
SP - 492
EP - 496
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
IS - 2
ER -