Structure Refinements of Solid Solutions in the System CaO.MgO.2 $2 SiO_2-Al_2O_3$

CaO.MgO.$2 SiO_2-Al_2O_3$계의 고용체의 결정구조

  • ;
  • ;
  • N. Ishizowa
  • 안영필 (한양대학교 무기재료공학과) ;
  • 김복희 (한양대학교 무기재료공학과) ;
  • Published : 1986.05.01

Abstract

This study was to refined the crystal structure of solid solution to determine the position and amount of Al in diopside and to relate crystal structure changes and properties of solid solution. Single crystals of the solid solution in the system CaO.MgO.$2 SiO_2-Al_2O_3$ were made from the melt with slow cooling and used to refine the structure. The following were obtained. 1. Tetrahedra rotated around axis parallel to the direction which the angle 03-03-03 became small. 2. Tetrahedron became large and regular. Average T-O bond distance increased 0.53 percent. 3. M1 octahedron became small and average M1-O bond distance decreased 1.1 percent. 4, M2 polyhedron became small and average M2-O bond distance decreased 0.37 percent Polythedron was affected not so much compared with any cation site. 5. Distance between metal ions distances between T and oxygens which were coordinated with M2 and meighboring tetrahedron distances between M2 and oxygens which coordinated with M1 and M2 were not changed almost. 6. $Al^{3+}$ substituted 4Mg^{2+}$ and $Si^{4+}$

Keywords

References

  1. U.S. Patent 3,652,207 Process for the Production of Synthetic Diopside J. Wuhrer
  2. 日本特許昭 46-20718 透輝石 燒結體の 製造法 野元堅一郞
  3. Z. Krist. v.69 The Structure of Diopside, CaMg(SiO₃)₂ B. Warren;W. L. Bragg
  4. Am. J. Sci. v.5 no.9 The Space Group of Diopside {CaMg(SiO₃)₂} R. W. G. Wyckoff;H. E. Merwin
  5. Am. Miner. v.51 The Crystal Structure of Jadeite, $NaAlSi_2O_6$ C. T. Prewitt;C. W. Burnham
  6. Z. Krist. Bd v.125 A Proposed Crystallographic Nomenclature for Clinopyroxene Structures C. W. Burnham;J. R. Clark;J. J. Papike;C. T. Prewitt
  7. International Tables for X-Ray Cystallography v.1 Kynoch Press
  8. X線結晶 解析 ?井敏雄
  9. International Table for X-Ray Crystallography v.11 Kynoch Press
  10. Acta. Cryst. v.A.26 Anisotropic Extinction Correction in the Zachariasen Approximation P. Coppens;W. C. Hamilton
  11. International Tables for X-Ray Crystallography. v.Ⅳ Kynoch Press
  12. Am. Miner. v.65 Structure and Elastic Properties of Quartz at Pressure L. Levien;C. T. Prewitt;D. J. Weidner
  13. Science v.72 Quadratic Elongation : A Quantitative Measure of Distortion in Coordination Polyhedra K. Robinson;G. V. Gibbs;P. H. Ribbe
  14. Am. Miner. v.55 Recent Discussion of Pyroxene and Amphiboles, 1. Amphibole semina J. B. Thompson
  15. Acta Cryst. v.B25 Effective ionic Radii Oxide and Fluorides R. D. Shannon;C. T. Prewitt
  16. Am. Miner. v.58 High-temperature Crystal Chemistry of Acmite, Diopside, Hedenbergite, Jadeite, Spodumene and Uregite M. Cameron;S. Sueno;C. T. Prewitt;J. J. Papike
  17. Am. Miner. v.58 The High Temperature Crystal Chemistry of Tremolite S. Sueno;M. Cameron;J. J. Papike;C. T. Prewitt
  18. J. Kor. Ceram. Soc. v.20 no.1 A Study on the Forming of Solid Solution in CaO·MgO·2SiO₂-Al₂O₃System Y. P. Ahn;B. H. Kim
  19. Acta. Cryst. v.16 Crystal Structure of Monoclinic Metaboric Acid W. H. Zachariasen
  20. Modern ceramics Engineering, Properties, Processing and Use in Design D. W. Richarson