CRYSTAL-STRUCTURES OF THE HIGH-TEMPERATURE FORMS OF LN(2)SI(2)O(7) (LN=LA, CE, PR, ND, SM) REVISITED
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, cilt.77, sa.11, ss.2968-2970, 1994 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 77 Sayı: 11
- Basım Tarihi: 1994
- Doi Numarası: 10.1111/j.1151-2916.1994.tb04532.x
- Dergi Adı: JOURNAL OF THE AMERICAN CERAMIC SOCIETY
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.2968-2970
- Orta Doğu Teknik Üniversitesi Adresli: Hayır
Özet
The crystal structures of the high-temperature forms of light lanthanide pyrosilicates (disilicates), i.e., (La-to-Sm)(2)Si2O7, have been studied with powder X-ray diffraction on the quenched samples. These compounds have monoclinic structures with the space group P2(1)/n rather than orthorhombic structures. In the research of the last two decades, the smallness of the monoclinic angles (90.1 degrees-91 degrees) has possibly obscured the revelation of the true structural nature of these compounds. New XRD patterns are suggested for the studied lanthanide pyrosilicates exhibiting the monoclinic characteristics of the unit cells.