THE CRYSTAL STRUCTURE AND PHASE TRANSITIONS OF β-Zn<sub>2</sub>P<sub>2</sub>O<sub>7</sub>

Canadian Science Publishing - Tập 43 Số 5 - Trang 1147-1153 - 1965
C. Calvo1
1Cl~emistry, iIIcilCaster University, fIa?ililto71, Onta~io

Tóm tắt

β-Zn2P2O7 crystallizes in the C2/m space group with lattice parameters a = 6.61 ± 0.01 Å, b = 8.29 ± 0.01 Å, c = 4.51 ± 0.01 Å, β = 105.4° ± 0.2° and z = 2. The anion, P2O7−4, is centered with its mirror plane coinciding with the mirror plane of the space group. The central oxygen atom, however, shows high anisotropic thermal motion and thus it appears that the P—O—P bond angle is linear only as a result of thermal averaging. The cations are found on twofold axes in irregular sixfold coordination and these ZnO6 groups share three edges with neighboring cations. This cation coordination is, therefore, consistent with that predicted from the red emission of β-Zn2P2O7:Mn++.

Từ khóa


Tài liệu tham khảo

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Canadian Science Publishing

Tập 43 Số 5

1147-1153

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