Mineralogical Magazine最新文献

{"title":"Ebnerite and epiebnerite: NH4ZnPO4 dimorphs with zeolite-type frameworks from the Rowley mine, Arizona, USA","authors":"Anthony R. Kampf, Xiangping Gu, Hexiong Yang, Chi Ma, Joe Marty","doi":"10.1180/mgm.2024.15","DOIUrl":"https://doi.org/10.1180/mgm.2024.15","url":null,"abstract":"<p>Ebnerite and epiebnerite, both with the ideal formula NH<span>4</span>ZnPO<span>4</span>, are new mineral species from the Rowley mine, Maricopa County, Arizona, USA. They occur in an unusual bat-guano-related, post-mining assemblage of phases. Epiebnerite grows epitactically on ebnerite and replaces it. Ebnerite and epiebnerite are found in intimate association with alunite, halite, mimetite, newberyite, sampleite, struvite and wulfenite on hematite-rich quartz–baryte matrix. Crystals of ebnerite are colourless narrow prisms up to ~0.3 mm in length. The streak is white, lustre is vitreous, Mohs hardness is ~2, tenacity is brittle and fracture is splintery. The density is 2.78(2) g⋅cm<span>–3</span>. Ebnerite is optically uniaxial (–) with ω = 1.585(2) and ɛ = 1.575(2). Epiebnerite occurs as colourless prisms or blades, up to about 10 × 3 × 2 μm, in parallel growth forming ribs with serrated edges epitactic on ebnerite prisms. The streak is white, lustre is vitreous, Mohs hardness is probably ~2, tenacity is brittle. The calculated density is 2.851 g⋅cm<span>–3</span>. Epiebnerite is optically biaxial with all indices of refraction near 1.580. Electron microprobe analysis gave the empirical formula [(NH<span>4</span>)<span>0.89</span>K<span>0.06</span>]<span>Σ0.95</span>(Zn<span>0.96</span>Cu<span>0.07</span>)<span>Σ1.03</span>[(P<span>0.97</span>Si<span>0.03</span>)<span>Σ1.00</span>O<span>4</span>] for ebnerite and [(NH<span>4</span>)<span>0.67</span>K<span>0.28</span>]<span>Σ0.95</span>(Zn<span>0.99</span>Cu<span>0.02</span>)<span>Σ1.02</span>(P<span>1.00</span>O<span>4</span>) for epiebnerite. Ebnerite is hexagonal, <span>P</span>6<span>3</span>, with <span>a</span> = 10.67051(16), <span>c</span> = 8.7140(2) Å, <span>V</span> = 859.25(3) Å<span>3</span> and <span>Z</span> = 8. Epiebnerite is monoclinic, <span>P</span>2<span>1</span>, with <span>a</span> = 8.796(16), <span>b</span> = 5.457(16), <span>c</span> = 8.960(16) Å, β = 90.34(6)°, <span>V</span> = 430.1(17) Å<span>3</span> and <span>Z</span> = 4. The structures of ebnerite (<span>R</span><span>1</span> = 0.0372 for 1168 <span>I</span><span>o</span> &gt; 2σ<span>I</span> reflections) and epiebnerite (known from synthetic monoclinic NH<span>4</span>ZnPO<span>4</span>) are zeolite-like frameworks based upon corner-sharing linkages between alternating ZnO<span>4</span> and PO<span>4</span> tetrahedra with channels in the frameworks hosting the NH<span>4</span> groups. The two structures are topologically distinct. Ebnerite belongs to the family of ‘stuffed derivatives’ of tridymite, whereas epiebnerite possesses an ABW-type zeolite structure.</p>","PeriodicalId":18618,"journal":{"name":"Mineralogical Magazine","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141063109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Immobilisation of chromium in magnesium carbonate minerals","authors":"Alicja M. Lacinska, Keith Bateman, Simon Chenery, Simon J Kemp, Thomas Liddy, Jeremy C Rushton, Dipankar Saha, Sven L.M. Schroeder","doi":"10.1180/mgm.2023.91","DOIUrl":"https://doi.org/10.1180/mgm.2023.91","url":null,"abstract":"<p>Hexavalent chromium (Cr<span>6+</span>) is a toxic carcinogenic pollutant that might be released by the mining and processing of ultramafic rocks and nickel laterites and which requires permanent removal from the contaminated biosphere. Ultramafic material can also serve as a feedstock for the sequestration of CO<span>2</span> resulting from the growth of new minerals, raising the intriguing proposition of integrated sequestration of both pollutants, CO<span>2</span> and chromium, into magnesium carbonates. Such a synergistic process downstream of ore recovery and mineral processing could be an elegant proposition for more sustainable utilisation and management of the Earth's resources. We have therefore carried out an experimental and microanalytical study to investigate potentially suitable carbonate minerals. Uptake of chromium in carbonate phases was determined, followed by identification of the crystalline phases and characterisation of the local structural environment around the incorporated chromium centres. The results suggest that neither nesquehonite nor hydromagnesite have the structural capacity to incorporate Cr<span>6+</span> or Cr<span>3+</span> significantly at room temperature. We therefore propose that further research into this technology should focus on laboratory assessments of other phases, such as layered double hyroxides, that have a natural structural capacity to uptake both chromium and CO<span>2</span>.</p>","PeriodicalId":18618,"journal":{"name":"Mineralogical Magazine","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140045699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Crystal structure of Pb-bearing watanabeite from Pefka (Greece)","authors":"C. Biagioni, P. Voudouris, Y. Moëlo, J. Sejkora, Z. Dolníček, Silvia Musetti, D. Mauro","doi":"10.1180/mgm.2024.14","DOIUrl":"https://doi.org/10.1180/mgm.2024.14","url":null,"abstract":"","PeriodicalId":18618,"journal":{"name":"Mineralogical Magazine","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140265938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterisation, axial anisotropy, and formation conditions of celestine minerals from the Jabal Eghei (Nuqay) late Neogene – Pleistocene volcanic province, southeastern edge of the Sirt Basin, southern Libya: Constraints on the mineralogical geothermometer – ERRATUM","authors":"P. Tančić, Maja Milošević, D. Spahić, Bojan Kostić, Aleksandar Kremenović, Maja Poznanović-Spahić, Jovan Kovačević","doi":"10.1180/mgm.2024.12","DOIUrl":"https://doi.org/10.1180/mgm.2024.12","url":null,"abstract":"","PeriodicalId":18618,"journal":{"name":"Mineralogical Magazine","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140426783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermal behavior of filatovite – a rare aluminoarsenate mineral of the feldspar group","authors":"L. Gorelova, O. Vereshchagin, V. Bocharov, N. V. Potekhina, E. Zhitova, I. Pekov","doi":"10.1180/mgm.2024.10","DOIUrl":"https://doi.org/10.1180/mgm.2024.10","url":null,"abstract":"","PeriodicalId":18618,"journal":{"name":"Mineralogical Magazine","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140427462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Kristjánite, KNa2H(SO4)2, a new fumarolic mineral from Iceland containing [SO4-H-SO4]3- anion in the crystal structure","authors":"T. Balić-Žunić, F. Nestola, M. Pamato, Maja B. Rasmussen","doi":"10.1180/mgm.2024.4","DOIUrl":"https://doi.org/10.1180/mgm.2024.4","url":null,"abstract":"","PeriodicalId":18618,"journal":{"name":"Mineralogical Magazine","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140425727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enricofrancoite, KNaCaSi4O10, a new Ca-K-Na silicate from Somma-Vesuvius volcano, southern Italy","authors":"G. Balassone, T. Panikorovskii, Annamaria Pellino, A. Bazai, V. Bocharov, O. F. Goychuk, Evgenia Yu. Avdontseva, V. Yakovenchuk, S. V. Krivovichev, C. Petti, P. Cappelletti, N. Mondillo, A. Moliterni, A. Altomare, Francesco Izzo","doi":"10.1180/mgm.2024.9","DOIUrl":"https://doi.org/10.1180/mgm.2024.9","url":null,"abstract":"","PeriodicalId":18618,"journal":{"name":"Mineralogical Magazine","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140431861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nomenclature of the ancylite supergroup","authors":"Yanjuan Wang, F. Nestola, Zengqian Hou, R. Miyawaki, I. Pekov, Xiangping Gu, Guochen Dong, Kai Qu","doi":"10.1180/mgm.2024.8","DOIUrl":"https://doi.org/10.1180/mgm.2024.8","url":null,"abstract":"","PeriodicalId":18618,"journal":{"name":"Mineralogical Magazine","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140451935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Similarities and differences among selected gemmological varieties of chalcedony: chemistry, mineralogy and microstructure","authors":"Sara Monico, Marco Cantaluppi, Valeria Diella, G. Diego Gatta, Ilaria Adamo, Patrizia Fumagalli, Nicoletta Marinoni","doi":"10.1180/mgm.2023.92","DOIUrl":"https://doi.org/10.1180/mgm.2023.92","url":null,"abstract":"<p>This study describes a new variety of chalcedony with a unique inhomogeneous bluish green hue, named aquaprase. It was discovered in Africa and is considered to be a valuable addition to the gem trade. A multi-methodological approach was used to examine its chemistry, mineralogy and microstructure, which were then compared to those of chrysoprase and agate, two of the most popular varieties of chalcedony. Optical microscopy revealed a complex microstructural heterogeneity in the different colour intensity areas/bands of aquaprase and agate, whereas chrysoprase exhibited a more homogeneous coexistence of micro- and cryptocrystalline quartz. High-resolution synchrotron XRD was essential for highlighting the complex assemblage of various types of α-quartz in aquaprase and agate (which differ in terms of crystal size and/or cell parameters). Micro-Raman spectroscopy revealed α-quartz and moganite in all three varieties of chalcedony and the presence of the nickel-bearing layered silicate mineral, willemseite, in chrysoprase, which is responsible for its green colouration. The chemical analysis displayed a homogeneous composition of agate, as well as high levels of nickel content in the chrysoprase variety. Aquaprase showed significant amounts (ppm by weight) of trace elements (Al, Mg, Na, K, Ca, Ti, U and Fe) characteristic of its formation environment, as well as high values of Cr, which are thought to be the cause of its bluish green colouration.</p>","PeriodicalId":18618,"journal":{"name":"Mineralogical Magazine","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139771419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mn-Fe-rich genthelvite from pegmatites associated with the Madeira Sn-Nb-Ta deposit (Pitinga, Brazil): new constraints on the magmatic-hydrothermal transition in the albite-enriched granite system","authors":"I. W. Hadlich, A. C. Bastos Neto, V. P. Pereira, N. F. Botelho, L. H. Ronchi, H. G. Dill","doi":"10.1180/mgm.2023.87","DOIUrl":"https://doi.org/10.1180/mgm.2023.87","url":null,"abstract":"","PeriodicalId":18618,"journal":{"name":"Mineralogical Magazine","volume":null,"pages":null},"PeriodicalIF":2.7,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139839638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}