書誌事項
- 公開日
- 1980-07
- 権利情報
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- https://www.elsevier.com/tdm/userlicense/1.0/
- DOI
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- 10.1016/0025-5408(80)90217-2
- 公開者
- Elsevier BV
この論文をさがす
説明
Abstract The modifications of CaAl 2 O 4 and CaGa 2 O 4 with the stuffed tridymite structure were examined under high temperatures (600 ∼ 1500 °C) and high pressures (10 ∼ 40 kb). Calcium monoaluminate CaAl 2 O 4 was found to transform to three kinds of high-pressure modifications. The original CaAl 2 O 4 (CA-I) changed to the phase CA-II which had m-CaGa 2 O 4 type structure with a different array of tetrahedra in the six-membered rings of tetrahedron. The phase CA-II transformed either to the phase CA-IV with CaFe 2 O 4 type structure or to an unknown phase (CA-III) under high pressures. The phase CA-IV was obtained under the pressures above 30 kb and at the temperatures above 1000 °C. Calcium monogallate CaGa 2 O 4 transformed to the CaFe 2 O 4 type structure above 30kb and 700 °C. No phases such as CA-II and CA-III were found. The structural relations among these modifications were discussed.
収録刊行物
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- Materials Research Bulletin
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Materials Research Bulletin 15 (7), 925-932, 1980-07
Elsevier BV
