 | Žáček, V., Škoda, R., Laufek, F., Košek, F., Jehlička, J. (2019) Complementing knowledge about rare sulphates lonecreekite, NH4Fe3+(SO4)2·12 H2O and sabieite, NH4Fe3+(SO4)2: chemical composition, XRD and RAMAN spectroscopy (Libušín near Kladno, the Czech Republic) Journal of GEOsciences, 64 (2) 149-159 | Journal (article/letter/editorial) | | Complementing knowledge about rare sulphates lonecreekite, NH4Fe3+(SO4)2·12 H2O and sabieite, NH4Fe3+(SO4)2:...Prague 2, Czech Republic Corresponding author Lonecreekite and sabieite, hydrous and anhydrous ferric ammonium...phases in the mixture. The empirical formula of lonecreekite is [(NH4)0.98K0.02]∑1.00 (Fe0.70Al0.24Mg0.02)∑0...461 and 443 cm–1 (ν2), and 616 cm–1 (ν4) for lonecreekite (where ν1 and ν3 are stretching modes of the...siderite-bearing sedimentary rock at ~115–350 °C. The lonecreekite originated through hydration of the sabieite |
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