V. Žáček, R. Škoda, F. Laufek, F. Košek, J. Jehlička
{"title":"关于稀有硫酸盐的补充知识,Lonecereite,NH4Fe3+(SO4)2·12 H2O和sabieite,NH4Fe3+(SO4)2:化学成分,XRD和拉曼光谱(捷克共和国克拉德诺附近的Libušín)","authors":"V. Žáček, R. Škoda, F. Laufek, F. Košek, J. Jehlička","doi":"10.3190/JGEOSCI.283","DOIUrl":null,"url":null,"abstract":"Lonecreekite and sabieite, hydrous and anhydrous ferric ammonium sulphates, were identified among the products of a long-lasting subsurface fire in the waste heap of the Schoeller coal mine in Libušín near Kladno, Central Bohemia, Czech Republic. No monomineralic fractions could be extracted as the minerals occur in a fine-grained aggregate with minor ferroan boussingaultite, tschermigite, and traces of efremovite. Powder X-ray diffraction, electron-microprobe analysis and Raman spectroscopy were used to identify the mineral phases in the mixture. The empirical formula of lonecreekite is [(NH4)0.98K0.02]∑1.00 (Fe0.70Al0.24Mg0.02)∑0.96 (SO4) 2.05·12 H2O, and the calculated unit-cell (Pa3̅ ) parameter a = 12.2442(2) Å, with a cell volume of V = 1835.68(9) Å3. The composition of sabieite corresponds to the formula [(NH4)0.98K0.02]∑1.00 (Fe0.70Al0.24Mg0.02)∑0.96 (SO4) 2.05, and the calculated unit-cell parameters (P321) are a = 4.826(1) Å, c = 8.283(2) Å, V = 167.10(8) Å3, assuming that only the 1T polytype is present. Raman spectroscopy was conducted on both minerals, giving strong Raman bands at 1037 cm–1 (ν1), 1272 cm–1 (ν3), 462 cm–1 (ν2), 643 cm–1 (ν4), 313 (M–O vibration) for sabieite; and at 991 cm–1 (ν1), 1132 and 1104 cm–1 (ν3), 461 and 443 cm–1 (ν2), and 616 cm–1 (ν4) for lonecreekite (where ν1 and ν3 are stretching modes of the (SO4)-group and ν2 and ν4 are bending modes). The sabieite most probably formed by in situ decomposition of the siderite-bearing sedimentary rock at ~115–350 °C. The lonecreekite originated through hydration of the sabieite when the sample was stored at ambient temperature. Empirical formulae of associated ferroan boussingaultite and tschermigite are also given, respectively, as (NH4)2 (Mg0.62Fe0.36Mn0.06)∑1.04 (SO4)1.97·6 H2O and [(NH4)0.98K0.02]∑1.00 (Al0.97Fe0.06)∑1.03 (SO4)2.97·12 H2O.","PeriodicalId":15957,"journal":{"name":"Journal of Geosciences","volume":null,"pages":null},"PeriodicalIF":1.1000,"publicationDate":"2019-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":"{\"title\":\"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)\",\"authors\":\"V. Žáček, R. Škoda, F. Laufek, F. Košek, J. Jehlička\",\"doi\":\"10.3190/JGEOSCI.283\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Lonecreekite and sabieite, hydrous and anhydrous ferric ammonium sulphates, were identified among the products of a long-lasting subsurface fire in the waste heap of the Schoeller coal mine in Libušín near Kladno, Central Bohemia, Czech Republic. No monomineralic fractions could be extracted as the minerals occur in a fine-grained aggregate with minor ferroan boussingaultite, tschermigite, and traces of efremovite. Powder X-ray diffraction, electron-microprobe analysis and Raman spectroscopy were used to identify the mineral phases in the mixture. The empirical formula of lonecreekite is [(NH4)0.98K0.02]∑1.00 (Fe0.70Al0.24Mg0.02)∑0.96 (SO4) 2.05·12 H2O, and the calculated unit-cell (Pa3̅ ) parameter a = 12.2442(2) Å, with a cell volume of V = 1835.68(9) Å3. The composition of sabieite corresponds to the formula [(NH4)0.98K0.02]∑1.00 (Fe0.70Al0.24Mg0.02)∑0.96 (SO4) 2.05, and the calculated unit-cell parameters (P321) are a = 4.826(1) Å, c = 8.283(2) Å, V = 167.10(8) Å3, assuming that only the 1T polytype is present. Raman spectroscopy was conducted on both minerals, giving strong Raman bands at 1037 cm–1 (ν1), 1272 cm–1 (ν3), 462 cm–1 (ν2), 643 cm–1 (ν4), 313 (M–O vibration) for sabieite; and at 991 cm–1 (ν1), 1132 and 1104 cm–1 (ν3), 461 and 443 cm–1 (ν2), and 616 cm–1 (ν4) for lonecreekite (where ν1 and ν3 are stretching modes of the (SO4)-group and ν2 and ν4 are bending modes). The sabieite most probably formed by in situ decomposition of the siderite-bearing sedimentary rock at ~115–350 °C. The lonecreekite originated through hydration of the sabieite when the sample was stored at ambient temperature. Empirical formulae of associated ferroan boussingaultite and tschermigite are also given, respectively, as (NH4)2 (Mg0.62Fe0.36Mn0.06)∑1.04 (SO4)1.97·6 H2O and [(NH4)0.98K0.02]∑1.00 (Al0.97Fe0.06)∑1.03 (SO4)2.97·12 H2O.\",\"PeriodicalId\":15957,\"journal\":{\"name\":\"Journal of Geosciences\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.1000,\"publicationDate\":\"2019-01-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"4\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Geosciences\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://doi.org/10.3190/JGEOSCI.283\",\"RegionNum\":4,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"GEOCHEMISTRY & GEOPHYSICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Geosciences","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.3190/JGEOSCI.283","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"GEOCHEMISTRY & GEOPHYSICS","Score":null,"Total":0}
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)
Lonecreekite and sabieite, hydrous and anhydrous ferric ammonium sulphates, were identified among the products of a long-lasting subsurface fire in the waste heap of the Schoeller coal mine in Libušín near Kladno, Central Bohemia, Czech Republic. No monomineralic fractions could be extracted as the minerals occur in a fine-grained aggregate with minor ferroan boussingaultite, tschermigite, and traces of efremovite. Powder X-ray diffraction, electron-microprobe analysis and Raman spectroscopy were used to identify the mineral phases in the mixture. The empirical formula of lonecreekite is [(NH4)0.98K0.02]∑1.00 (Fe0.70Al0.24Mg0.02)∑0.96 (SO4) 2.05·12 H2O, and the calculated unit-cell (Pa3̅ ) parameter a = 12.2442(2) Å, with a cell volume of V = 1835.68(9) Å3. The composition of sabieite corresponds to the formula [(NH4)0.98K0.02]∑1.00 (Fe0.70Al0.24Mg0.02)∑0.96 (SO4) 2.05, and the calculated unit-cell parameters (P321) are a = 4.826(1) Å, c = 8.283(2) Å, V = 167.10(8) Å3, assuming that only the 1T polytype is present. Raman spectroscopy was conducted on both minerals, giving strong Raman bands at 1037 cm–1 (ν1), 1272 cm–1 (ν3), 462 cm–1 (ν2), 643 cm–1 (ν4), 313 (M–O vibration) for sabieite; and at 991 cm–1 (ν1), 1132 and 1104 cm–1 (ν3), 461 and 443 cm–1 (ν2), and 616 cm–1 (ν4) for lonecreekite (where ν1 and ν3 are stretching modes of the (SO4)-group and ν2 and ν4 are bending modes). The sabieite most probably formed by in situ decomposition of the siderite-bearing sedimentary rock at ~115–350 °C. The lonecreekite originated through hydration of the sabieite when the sample was stored at ambient temperature. Empirical formulae of associated ferroan boussingaultite and tschermigite are also given, respectively, as (NH4)2 (Mg0.62Fe0.36Mn0.06)∑1.04 (SO4)1.97·6 H2O and [(NH4)0.98K0.02]∑1.00 (Al0.97Fe0.06)∑1.03 (SO4)2.97·12 H2O.
期刊介绍:
The Journal of Geosciences is an international peer-reviewed journal published by the Czech Geological Society with support from the Czech Geological Survey. It accepts high-quality original research or review papers dealing with all aspects of the nature and origin of igneous and metamorphic rocks. The Journal focuses, mainly but not exclusively, on:
-Process-oriented regional studies of igneous and metamorphic complexes-
Research in structural geology and tectonics-
Igneous and metamorphic petrology-
Mineral chemistry and mineralogy-
Major- and trace-element geochemistry, isotope geochemistry-
Dating igneous activity and metamorphic events-
Experimental petrology and mineralogy-
Theoretical models of igneous and metamorphic processes-
Mineralizing processes and mineral deposits.
All the papers are written in English, even though they may be accompanied by an additional Czech abstract. Each contribution is a subject to peer review by at least two independent reviewers, typically at least one from abroad. The Journal appears 2 to 4 times a year. Formally it is divided in annual volumes, each of them including 4 issues.