Fluorite related ordered compounds in the ZrO/sub 2/--CaO and ZrO/sub 2/--Y/sub 2/O/sub 3/ systems

Journal Article · Sun May 01 04:00:00 EDT 1977 · Mater. Res. Bull.; (United States)

DOI:https://doi.org/10.1016/0025-5408(77)90122-2· OSTI ID:7210704

Ray, S P; Stubican, V S

ZrO/sub 2/:CaO and ZrO/sub 2/:Y/sub 2/O/sub 3/ systems have been examined for possible ordered compounds. Fluorite related ordered compounds CaZr/sub 4/O/sub 9/ and Zr/sub 3/Y/sub 4/O/sub 12/ have been successfully prepared and identified. While it is believed that the former is monoclinic with a = 17.813 +- 0.005A, b = 14.612 +- .004A, c = 12.065 +- .003A and ..beta.. = 119.5 +- .02/sup 0/ and isostructural with CaHf/sub 4/O/sub 9/, the latter appears to be isostructural with M/sub 7/O/sub 12/ type of compounds with a = 9.723 +- .001A and c = 9.090 +- 0.002A, which is formed commonly in compounds containing tri and tetravalent cations and is characterized by a chain oxygen vacancy along a (111) of the original fluorite. No other fluorite related ordered compound could be detected in these systems.

• Research Organization: Pennsylvania State Univ., University Park
• OSTI ID: 7210704
• Journal Information: Mater. Res. Bull.; (United States), Journal Name: Mater. Res. Bull.; (United States) Vol. 12:5; ISSN MRBUA
• Country of Publication: United States
• Language: English

Related Subjects

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