TY - JOUR
T1 - Crystal structure and thermal expansion of Ca2Y2Si2O9
AU - Yamane, H.
AU - Nagasawa, T.
AU - Murakami, Y.
AU - Kamata, T.
AU - Shindo, D.
AU - Shimada, M.
AU - Endo, Tadashi
N1 - Funding Information:
This work was partly supported by the Ministry of Education, Science, Sports and Culture of Japan, by Nippon Sheet Glass Foundation for Materials Science and Engineering, and by NEDO under the Synergy Ceramics Project of the Industrial Science and Technology Frontier Program promoted by AIST, MITI, Japan. M.S. is a member of the Joint Research Consortium of Synergy Ceramics. We thank Kaoru Sasaki for operating the gold image furnace and Kyota Ueda for aid with X-ray diffraction data collection.
PY - 1998
Y1 - 1998
N2 - The crystal structure of Ca2Y2Si2O9 was studied by X-ray and electron diffraction. Statistical atomic site positions were determined in an orthorhombic cell, a = 10.453(3), b = 3.720(2), c = 10.290(2) Å, space group Pnma. The local structure of Si2O7 silicate anions was illustrated from the refined atomic positions. The Ca2Y2Si2O9 structure could be explained by locally disordered arrangement of Y4Al2O9 monoclinic structure. The linear thermal expansion coefficient of Ca2Y2Si2O9 ceramics measured by dilatometry was 9.3 × 10-6 °C-1 from room temperature to 1500°C.
AB - The crystal structure of Ca2Y2Si2O9 was studied by X-ray and electron diffraction. Statistical atomic site positions were determined in an orthorhombic cell, a = 10.453(3), b = 3.720(2), c = 10.290(2) Å, space group Pnma. The local structure of Si2O7 silicate anions was illustrated from the refined atomic positions. The Ca2Y2Si2O9 structure could be explained by locally disordered arrangement of Y4Al2O9 monoclinic structure. The linear thermal expansion coefficient of Ca2Y2Si2O9 ceramics measured by dilatometry was 9.3 × 10-6 °C-1 from room temperature to 1500°C.
KW - A. oxides
KW - C. electron diffraction
KW - C. X-ray diffraction
KW - D. crystal structure
KW - D. thermal expansion
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U2 - 10.1016/S0025-5408(98)00059-2
DO - 10.1016/S0025-5408(98)00059-2
M3 - Article
AN - SCOPUS:0032084060
SN - 0025-5408
VL - 33
SP - 845
EP - 853
JO - Materials Research Bulletin
JF - Materials Research Bulletin
IS - 6
ER -