K[sub 1[minus]x]La[sub x]Ca[sub 2[minus]x]Nb[sub 3]O[sub 10], a layered perovskite series with variable interlayer cation density, and LaCaNb[sub 3]O[sub 10], a novel layered perovskite oxide with no interlayer cations

Journal Article · Mon Feb 01 00:00:00 EST 1993 · Journal of Solid State Chemistry; (United States)

DOI:https://doi.org/10.1006/jssc.1993.1042· OSTI ID:6612176

Uma, S; Gopalakrishnan, J ^[1]

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1. Indian Inst. of Science, Bangalore (India)

A series of layered perovskite oxides of the formula K[sub 1[minus]x]La[sub x]Ca[sub 2[minus]x]Nb[sub 3]O[sub 10] for 0 < x [le] 1.0 have been prepared. All the members are isostructural, possessing the structure of KCa[sub 2]Nb[sub 3]O[sub 10]. The interlayer potassium ions in the new series can be ion-exchanged with protons to give H[sub 1[minus]x]La[sub x]Ca[sub 2[minus]x]Nb[sub 3]O[sub 10]. The latter readily forms intercalation compounds of the formula (C[sub n]H[sub 2n+1]NH[sub 3])[sub 1[minus]x]La[sub x]Ca[sub 2[minus]x]Nb[sub 3]O[sub 10], just as the parent solid acid HCa[sub 2]Nb[sub 3]O[sub 10]. The end member LaCaNb[sub 3]O[sub 10] containing no interlayer cations is a nove layered perovskite oxide, being a n = 3 member of the series A[sub n[minus]1]B[sub n]X[sub 3n+1]. 16 refs., 5 figs., 5 tabs.

• OSTI ID: 6612176
• Journal Information: Journal of Solid State Chemistry; (United States), Vol. 102:2; ISSN 0022-4596
• Country of Publication: United States
• Language: English

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