The structure contains highly distorted SnSe7 coordination polyhedra, which have three short and four very long Sn–Se bonds, and a lone pair of the Sn2+ sterically accommodated between the four long Sn–Se bonds.
ðə stɹˈʌktʃɚ kəntˈeɪnz hˈaɪli dɪstˈɔːɹɾᵻd ˌɛsˈɛn sˈiː sˈɛvən koʊˈɔːɹdᵻnˈeɪʃən pˌɑːlɪhˈiːdɹə, wˌɪtʃ hæv θɹˈiː ʃˈɔːɹt ænd fˈoːɹ vˈɛɹi lˈɔŋ ˌɛsˈɛn sˈiː bˈɑːndz, ænd ɐ lˈoʊn pˈɛɹ ʌvðɪ ˌɛsˈɛn tˈuː plˈʌs stˈɛɹɪkli ɐkˈɑːmədˌeɪɾᵻd bᵻtwˌiːn ðə fˈoːɹ lˈɔŋ ˌɛsˈɛn sˈiː bˈɑːndz.