 | Tait, K. T., Yang, H., Downs, R. T., Li, C., Pinch, W. W. (2010) The crystal structure of esperite, with a revised chemical formula, PbCa2(ZnSiO4)3, isostructural with beryllonite. American Mineralogist, 95 (5) 699-705 doi:10.2138/am.2010.3415 | Journal (article/letter/editorial) | | pages 699–705, 2010 The crystal structure of esperite, with a revised chemical formula, PbCa2(ZnSiO4)3...Pittsford, New York 14534, U.S.A. 1 absTraCT Esperite from Franklin, New Jersey, was first described...beryllonite-type subcells for esperite with the Ca:Pb ratio greater than 2:1. We examined two esperite fragments from...was solved in space group P21/n (R1 = 0.022). Esperite is isostructural with beryllonite, NaBePO4, and...PbCa2(ZnSiO4)3, Z = 4. The ZnO4 and SiO4 tetrahedra in esperite share corners to form an ordered framework, with |
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