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Natural and artificial OH defect incorporation into fluoride minerals at elevated temperature—a case study of sellaite, villiaumite and fluorite
The long-known presence of a sharp OH absorption band in the tetragonal fluoride mineral sellaite, MgF 2 , inspired us to conduct a detailed study of...
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On the factors controlling the incorporation of aluminium within titanites: a case study from medium pressure calc-silicate granulites in parts of the East Indian shield
High-aluminous, fluoro-titanites (~ 6.8–11.5 wt% Al 2 O 3 , up to ~ 3.8 wt% F) from a suite of calc-silicate granulites in the Chotanagpur Granite Gneiss...
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Discussion on “Syn-metamorphic sulfidation of the Gamsberg zinc deposit, South Africa” by Stefan Höhn, Hartwig E. Frimmel, and Westley Price
Höhn et al. (
2021 ) proposed that the giant Gamsberg Zn deposit, South Africa, initially formed as a sedimentary exhalative (SEDEX) deposit during the...
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Response to: Discussion on “Syn-metamorphic sulfidation of the Gamsberg zinc deposit, South Africa” by Stefan Höhn, Hartwig E. Frimmel, and Westley Price
Cawood et al. (this issue) critize our hypothesis of a pre-Klondikean weathering/oxidation event having affected the Aggeneys-Gamsberg ore district....
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Structural studies on synthetic A2−x[M2(TeO3)3]·nH2O phases (A = Na, K, Rb, Cs; M = Mn, Co, Ni, Cu, Zn) with zemannite-type structures
During a systematic study on formation conditions of new compounds with zemannite-type structures, crystals of ten new oxidotellurate(IV) phases were...
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Katsarosite Zn(C2O4)·2H2O, a new humboldtine-group mineral from the Lavrion Mining District, Greece
Katsarosite, ideally Zn(C 2 O 4 )·2H 2 O, named for Īraklīs Katsaros, is a new mineral found at the Esperanza Mine in the Kaminiza area of the Lavrion...
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Petrogenetic and geodynamic evolution of plutonic rocks from the Chadormalu district, Kashmar-Kerman tectonic zone, Central Iran
Late Precambrian–Early Paleozoic igneous rocks constitute volumetrically minor components of the Iranian Plateau but preserve important information...
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Interpretation of wide zircon U–Pb age distributions in durbachite-type Variscan granitoid in the Mórágy Hills
In situ U–Pb analyses were performed on SEM-BSE, SEM-CL and Raman mapped zircons from the Variscan granitoids exposed in the Mórágy pluton, Hungary....
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The flexibility of the T–X–T hinges between the coordination tetrahedra in various zeolitic frameworks: an empirical structural study
In recent years, a large number of precisely determined crystal structure determinations of zeolites, that is compounds based on open frameworks of...
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On the security of graphite supply
In order to achieve the ambitious goals vital to successfully combat global warming, new methods for the generation, storage and transport of...
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K[(CuII,MnII,MnIII)2(TeO3)3]∙2H2O, the first zemannite-type structure based on a Jahn-Teller-distorted framework
Synthetic single crystals of K[(Cu II ,Mn II ,Mn III ) 2 (TeO 3 ) 3 ]·2H 2 O were obtained from an overconcentrated alkaline aqueous solution in the system K 2 O-MnO-CuO-TeO...
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Ordovician arc and syncollisional magmatism in the İstanbul-Zonguldak Tectonic Unit (NW Turkey): Implications for the consumption of the Teisseyre-Tornquist Ocean in Far East Avalonia
The İstanbul-Zonguldak Tectonic Unit is an Amazonia-derived continental fragment added to Baltica during the middle Paleozoic, and represents Far...
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Are the [6]-coordinated sites in tourmaline in certain cases partially vacant?
Tourmaline has two different [6]-coordinated sites, the Y site and the Z site. Vacancies were reported from both sites. Based on high-quality...
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CuSeO4 and Cu(SeO3OH)2·6H2O, two novel copper–selenium(VI) oxysalts
The two new copper(II) salts Cu(SeO 4 ) and Cu(SeO 3 OH) 2 ·6H 2 O were synthesized at low-temperature hydrothermal conditions (220 °C), and room...
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A crystal structure refinement of uralolite, Ca2Be4(PO4)3(OH)3∙5H2O, from Weinebene, Austria
The crystal structure of uralolite, Ca 2 Be 4 (PO 4 ) 3 (OH) 3 ·5H 2 O, from the spodumene deposit of Weinebene, Carinthia, Austria, has been refined with X-ray...
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Ba-rich phlogopite, dissakisite-(Ce), and fluorine-rich clinohumite in granulite-facies marbles from the In Ouzzal terrane, Western Hoggar, Algeria
Granulite-facies marbles are part of the Archaean crust of the In Ouzzal terrane (Western Hoggar). Besides calcite and dolomite, these marbles are...
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A new A-type granitoid occurrence in southernmost Fennoscandia: geochemistry, age and origin of rapakivi-type quartz monzonite from the Pietkowo IG1 borehole, NE Poland
Rapakivi-type quartz monzonite and the underlying dark-grey granodiorite from the Pietkowo IG1 borehole, in the Polish part of southernmost...
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Petrogenesis of strongly peraluminous plutonic rocks of the Eastern Sakarya Zone (Trabzon, Turkey): implications for crustal melting and evolution
The Eastern Sakarya Zone in northeastern Turkey contributes for a natural laboratory to study subduction- to collision-related intrusive rocks. This...
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Crystal structure and optical absorption spectra of LiCo(SO4)OH and its remarkable relationship to the Zn-Mn-silicate hodgkinsonite
Crystals of the compound LiCo(SO 4 )OH were synthesised at low-hydrothermal conditions, and the crystal structure was determined and refined from...
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Concerning the incorporation of potassium in the crystal structure of combeite (Na2Ca2Si3O9)
Potassium incorporation in the structure of combeite has been studied in detail. Since natural combeites are known to contain only small amounts of...
