• journal_title：The Canadian Mineralogist
• Contributor：John E. Dutrizac ; Tzong T. Chen
• Publisher：Mineralogical Association of Canada
• Date：2003-
• Format：text/html
• Language：en
• Identifier：10.2113/gscanmin.41.2.479
• journal_abbrev：Can Mineral
• issn：0008-4476
• volume：41
• issue：2
• firstpage：479
• section：Articles

The V³⁺ analogues of natrojarosite, jarosite, rubidium-substituted jarosite, dorallcharite, hydronium jarosite, ammoniojarosite and plumbojarosite were synthesized using a conventional hydrolysis procedure. Although a temperature of 100°C was acceptable for most of the syntheses, a reaction temperature of 140°C was needed to give a satisfactory yield of the V³⁺ analogue of hydronium jarosite. Also, the V³⁺ analogue of plumbojarosite was synthesized by reacting an excess of PbSO₄ at 150°C, and subsequently dissolving any unreacted PbSO₄ at room temperature with ammonium acetate solution. Efforts to synthesize the V³⁺ analogue of argentojarosite were unsuccessful, as trivalent vanadium reduced the silver ion to metallic silver. The V³⁺ analogues of jarosite-group minerals commonly form spheroidal aggregates composed of individual crystals to 3 μm in diameter. According to X-ray powder-diffraction data, all the precipitates have the R3̅m structure of jarosite-group minerals; however, no ~11 Å reflection was detected in the V³⁺ analogue of plumbojarosite, indicating a lack of order involving the Pb²⁺ ions and associated vacancies. The densities of the V³⁺ analogues were also measured; relatively low values were obtained because of V-site vacancies in the structure.