Structure and properties of Sn(II)-. beta. double prime -alumina

Journal Article · · Chemistry of Materials; (USA)

OSTI ID:6396332

Rohrer, G S; Farrington, G C ^[1]; Thomas, J O ^[2]

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1. Univ. of Pennsylvania, Philadelphia (USA)
2. Univ. of Uppsala (Sweden)

Single crystals of Sn(II)-{beta}{double prime}-alumina, synthesized by ion exchange from the fast ion conductor Na-{beta}{double prime}-alumina, have been found to react with water vapor to form a hydrated compound with the formula Sn{sub 0.83}Mg{sub 0.67}Al{sub 10.33}O{sub 17}{center dot}(H{sub 2}O){sub x}. Thermogravimetric analysis, evolved gas analysis, and differential scanning calorimetry have been used to determine that x can vary between 0.0 and 0.74 and that the binding energy of the water is 0.75 eV. The anhydrous compound is luminescent under UV excitation. Luminescence spectra show a broad band in the visible range which can be assigned to the {sup 3}P{sub 1} to {sup 1}S{sub 0} transition. Single crystal X-ray diffraction studies were performed on both an anhydrous crystal and a hydrated crystal with x = 0.74. The crystals are in the rhombohedral space group, R{anti 3}m, and there are three formula units per unit cell. The effect of intercalated water on the structure and physical properties is discussed.

• OSTI ID: 6396332
• Journal Information: Chemistry of Materials; (USA), Journal Name: Chemistry of Materials; (USA) Vol. 2:4; ISSN CMATE; ISSN 0897-4756
• Country of Publication: United States
• Language: English

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