Topochemical intercalation reactions of ZrSe3
Intercalation of alkali and alkaline earth metals into ZrSe3 via soft chemical routes injects electrons and has a significant effect on the selenide-selenide bonding. K, Rb and Cs intercalates of ZrSe3 prepared at low temperatures (-78 °C) from metal ammonia solutions contrast with related polymorph...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Elsevier
2022
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| Summary: | Intercalation of alkali and alkaline earth metals into ZrSe3 via soft chemical routes injects electrons
and has a significant effect on the selenide-selenide bonding. K, Rb and Cs intercalates of ZrSe3
prepared at low temperatures (-78 °C) from metal ammonia solutions contrast with related
polymorphs obtained at high temperature (850 °C). KxZrSe3 synthesised at low temperatures
crystallises in orthorhombic Cmc21, while the polymorph obtained at high temperatures crystallises in
Immm. The two structures prepared under drastically different conditions differ by relative shifting of
ZrSe3 layers. In contrast, CsxZrSe3 shows the Immm polymorph at low temperature and the Cmc21
polymorph at high temperatures, while a single RbxZrSe3 polymorph in Immm is formed at both
temperatures. Intercalation of Ca from liquid ammonia facilitates the co-intercalation of the solvent
because of the strong solvation of Ca2+
. This compound has severe faulting due to the flexibility in the
relative shifts of adjacent ZrSe3 layers. |
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