Tin(II)-Iodide (CAS 10294-70-9) Description
Tin(II)-iodide (CAS 10294-70-9) is an ionic tin salt of iodine with the formula SnI2. SnI2 exhibits a layered structure in which I–Sn–I units are stacked one above the other. The bonds within each layer are covalent and ionic, while the bonds between layers are of a molecular or Van der Waals nature. SnI2 occurs in two modifications: one red and one yellow. The yellow form is the stable form above 100. The ionic nature is estimated at 20 % for both modifications.
Tin(II)-Iodide (CAS 10294-70-9) Specifications
Product Name
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Tin(II)-Iodide
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CAS No.
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10294-70-9
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Purity
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4N ~ 5N
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Molecular Weight
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372.52 g/mol
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Melting Point
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320° C (608° F)
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Density
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7.6 g/
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Tin(II)-Iodide (CAS 10294-70-9) Applications
Tin(II)-iodide (CAS No. 10294-70-9) exhibits an absorption spectrum characterised by an indirect bandgap. At 300 K the indirect transition bandwidth measures 2.068 eV and the phonon energy is 54 meV. With decreasing temperature the forbidden band for indirect transitions shifts to higher energies; at 86 K it typically measures 2.110 eV. Photoluminescence was not observed at room temperature; however, at 86 K two broad bands with maxima at 6294 were recorded, irrespective of whether they were emitted from a cleaved plane of a single crystal or from an end face.
The sole measurement of the thermoelectric performance indicated that Tin(II)-iodide acts as an ionic conductor in the temperature range 339–440 K. The conduction mechanism in the temperature range used in this work is not conclusively identified; however, it is assumed to be principally ionic, given that SnI2 in pressed disc form is employed as both an anode and a cathode in the construction of solid-state batteries with solid electrolytes.
Reference
TITILAYO ADELAJA KUKU: PHOTOLYSE VON ALPHA- UND BETA-ZINNDIJODID.
https://spiral.imperial.ac.uk/bitstream/10044/1/35630/2/Kuku-TA-1981-PhD-Thesis.pdf