Mineralogical Magazine

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CONTENTS OF No. 536, December 2017

2017 Mineralogical Magazine

doi:10.1180/minmag.2017.081.toc

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Journal Article

Crystal-chemical aspects of the roméite group, A2Sb2O6Y, of the pyrochlore supergroup

Bosi, Ferdinando; Christy, Andrew G.; Hålenius, Ulf

2017 Mineralogical Magazine

doi:10.1180/minmag.2016.080.166

AbstractFour specimens of the roméite-group minerals oxyplumboroméite and fluorcalcioroméite from the Långban Mn-Fe deposit in Central Sweden were structurally and chemically characterized by single-crystal X-ray diffraction, electron microprobe analysis and infrared spectroscopy. The data...

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Polloneite, a new complex Pb(-Ag)-As-Sb sulfosalt from the Pollone mine, Apuan Alps, Tuscany, Italy

Topa, Dan; Keutsch, Frank N.; Makovicky, Emil; Kolitsch, Uwe; Paar, Werner

2017 Mineralogical Magazine

doi:10.1180/minmag.2017.081.003

AbstractPolloneite, ideally AgPb46As26Sb23S120, is a new N = 4 member of the sartorite homologous series. It occurs in a matrix of baryte from the Pizzone level of the Pollone baryte-pyrite-(Pb-Zn-Ag) deposit at Valdicastello Carducci, near Pietrasanta, in the Apuan Alps, Tuscany, Italy, as...

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Chemical and textural interpretation of late-stage coffinite and brannerite from the Olympic Dam IOCG-Ag-U deposit

Macmillan, Edeltraud; Cook, Nigel J.; Ehrig, Kathy; Pring, Allan

2017 Mineralogical Magazine

doi:10.1180/minmag.2017.081.006

AbstractThe Olympic Dam iron-oxide copper-gold-silver-uranium deposit, South Australia, contains three dominant U minerals: uraninite; coffinite; and brannerite. Microanalytical and petrographic observations provide evidence for an interpretation in which brannerite and coffinite essentially...

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Rare-earth mobility as a result of multiple phases of fluid activity in fenite around the Chilwa Island Carbonatite, Malawi

Dowman, Emma; Wall, Frances; Treloar, Peter J.; Rankin, Andrew H.

2017 Mineralogical Magazine

doi:10.1180/minmag.2017.081.007

AbstractCarbonatites are enriched in critical raw materials such as the rare-earth elements (REE), niobium, fluorspar and phosphate. A better understanding of their fluid regimes will improve our knowledge of how to target and exploit economic deposits. This study shows that multiple fluid phases...

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Structural, chemical and spectroscopic re-examination of type uklonskovite leads to its redefinition

Menchetti, S.; Bindi, L.; Belakovskiy, D.; Zaccarini, F.

2017 Mineralogical Magazine

doi:10.1180/minmag.2017.081.009

AbstractThe crystal structure and the chemical composition of uklonskovite from the holotype material was reinvestigated to shed light on its correct chemical formula. On the basis of information gained from this characterization, we revised the formula from NaMg(SO4)OH·2H2O to NaMg(SO4)F·2H2O (F...

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Compositional variation of turquoise-group minerals from the historical collection of the Real Museo Mineralogico of the University of Naples

Rossi, Manuela; Rizzi, Rosanna; Vergara, Alessandro; Capitelli, Francesco; Altomare, Angela;

2017 Mineralogical Magazine

doi:10.1180/minmag.2017.081.055

AbstractFive turquoise samples, belonging to the XVII century historical collection of the Real Museo Mineralogico (University of Naples Federico II), were investigated by a multi-methodological approach based on powder X-ray diffraction, electron microprobe analysis in wavelength-dispersive...

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Magnesio-riebeckite from the Varenche mine (Aosta Valley, Italy): crystal-chemical characterization of a grandfathered end-member

Oberti, Roberta; Boiocchi, Massimo; Hawthorne, Frank C.; Ciriotti, Marco E.

2017 Mineralogical Magazine

doi:10.1180/minmag.2017.081.011

AbstractMagnesio-riebeckite from the dumps of the abandoned mine of Varenche (45°47’22’’ N, 7°29’17’’ E), Saint-Barthélemy, Nus, Aosta Valley (Italy), was studied to provide the complete mineral description (including crystal structure) and insights into the crystal-chemistry of riebeckite. The...

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The determination of the Sb/As content in natural tetrahedrite–tennantite and bournonite–seligmannite solid solution series by Raman spectroscopy

Apopei, A. I.; Damian, G.; Buzgar, N.; Buzatu, A.; Andráš, P.;

2017 Mineralogical Magazine

doi:10.1180/minmag.2017.081.008

AbstractNatural samples containing tetrahedrite-tennantite, bournonite-seligmannite and geocronite-jordanite from the Coranda-Hondol ore deposit, Romania, were investigated by Raman spectroscopy to determine its capability to provide estimates of solid solutions in three common and widespread...

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Journal Article

The seidozerite supergroup of TS-block minerals: nomenclature and classification, with change of the following names: rinkite to rinkite-(Ce), mosandrite to mosandrite-(Ce), hainite to hainite-(Y) and innelite-1T to innelite-1A

Sokolova, E.; Cámara, F.

2017 Mineralogical Magazine

doi:10.1180/minmag.2017.081.010

AbstractHere we report a nomenclature and classification for the seidozerite-supergroup minerals. The TS (Titanium-Silicate) block is the main structural unit in all seidozerite-supergroup structures; it consists of a central O (O = Octahedral) sheet and two adjacent H (H = Heteropolyhedral)...

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