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Revista Facultad de Ingeniería Universidad de Antioquia
versão impressa ISSN 0120-6230versão On-line ISSN 2422-2844
Resumo
SIERRA GALLEGO, Germán; ECHAVARRIA, Adriana e PALACIO, Luz Amparo. Synthesis of Libethenite through hydrothermal reactions. Rev.fac.ing.univ. Antioquia [online]. 2009, n.48, pp.9-17. ISSN 0120-6230.
The mineral Libethenite Cu2(PO4)(OH) was prepared through hydrothermal reaction under milder conditions than those previously reported. The product was characterized by X-ray diffraction (XRD), thermogravimetric analysis (TGA) and atomic absorption (AA). The crystal data were determined by X-ray crystallographic studies, which can be summarized as follows: space group Pnnm, a = 8,071(2), b = 8,403(4), c = 5,898(3) Å, V = 399 Å3 and Z = 4. Thermal analysis and X-ray diffraction studies showed that the solid is stable up to 580oC. At higher temperatures the Libetinita decomposes in Cu4O(PO4)2 and water.
Palavras-chave : Libethenite; copper phosphates; hydrothermal synthesis.