Articles | Volume 36, issue 3
https://doi.org/10.5194/ejm-36-449-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/ejm-36-449-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Review article
| 
10 Jun 2024
Review article |
| 10 Jun 2024
| 10 Jun 2024
Incorporation and substitution of ions and H2O in the structure of beryl
Institute of Geosciences, Johannes Gutenberg University Mainz, J.-J.-Becher-Weg 21, 55099 Mainz, Germany
Institute of Gemstone Research, Prof.-Schlossmacher-Straße 1, 55743 Idar-Oberstein, Germany
Tobias Häger
Institute of Geosciences, Johannes Gutenberg University Mainz, J.-J.-Becher-Weg 21, 55099 Mainz, Germany
Institute of Gemstone Research, Prof.-Schlossmacher-Straße 1, 55743 Idar-Oberstein, Germany
Roman Botcharnikov
Institute of Geosciences, Johannes Gutenberg University Mainz, J.-J.-Becher-Weg 21, 55099 Mainz, Germany
Institute of Gemstone Research, Prof.-Schlossmacher-Straße 1, 55743 Idar-Oberstein, Germany
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Roman Botcharnikov, Max Wilke, Jan Garrevoet, Maxim Portnyagin, Kevin Klimm, Stephan Buhre, Stepan Krasheninnikov, Renat Almeev, Severine Moune, and Gerald Falkenberg
Eur. J. Mineral., 36, 195–208, https://doi.org/10.5194/ejm-36-195-2024, https://doi.org/10.5194/ejm-36-195-2024, 2024
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The new spectroscopic method, based on the syncrotron radiation, allows for determination of Fe oxidation state in tiny objects or in heterogeneous samples. This technique is expected to be an important tool in geosciences unraveling redox conditions in rocks and magmas as well as in material sciences providing constraints on material properties.
Diao Luo, Marc K. Reichow, Tong Hou, M. Santosh, Zhaochong Zhang, Meng Wang, Jingyi Qin, Daoming Yang, Ronghao Pan, Xudong Wang, François Holtz, and Roman Botcharnikov
Eur. J. Mineral., 34, 469–491, https://doi.org/10.5194/ejm-34-469-2022, https://doi.org/10.5194/ejm-34-469-2022, 2022
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Volcanoes on Earth are divided into monogenetic and composite volcanoes based on edifice shape. Currently the evolution from monogenetic to composite volcanoes is poorly understood. There are two distinct magma chambers, with a deeper region at the Moho and a shallow mid-crustal zone in the Wulanhada Volcanic Field. The crustal magma chamber represents a snapshot of transition from monogenetic to composite volcanoes, which experience more complex magma processes than magma stored in the Moho.
Related subject area
Crystal chemistry
Crystal chemistry and molar volume of potassic-chloro-hastingsite
Pilanesbergite: a new rock-forming mineral occurring in nepheline syenite from the Pilanesberg Alkaline Complex, South Africa
Thermodynamics of vivianite-group arsenates M3(AsO4)2 ⋅ 8H2O (M is Ni, Co, Mg, Zn, Cu) and chemical variability in the natural arsenates of this group
Trace and ultratrace elements in spinel subgroup minerals of ultramafic rocks from the Voltri Massif (NW Italy): the influence of microstructure and texture
Genetic model for the color anomalies at the termination of pegmatitic gem tourmaline crystals from the island of Elba, Italy
Fe-bearing vanadium dioxide–paramontroseite: structural details and high-temperature transformation
Cation and anion ordering in synthetic lepidolites and lithian muscovites: influence of the OH ∕ F and Li ∕ Al ratios on the mica formation studied by NMR (nuclear magnetic resonance) spectroscopy and X-ray diffraction
Tin weathering experiment set by nature for 300 years: natural crystals of the anthropogenic mineral hydroromarchite from Creussen, Bavaria, Germany
New secondary phosphate mineral occurrences and their crystal chemistry, at the Hagendorf Süd pegmatite, Bavaria
Na-feldspar: temperature, pressure and the state of order
Jared P. Matteucci, David M. Jenkins, and M. Darby Dyar
Eur. J. Mineral., 36, 247–266, https://doi.org/10.5194/ejm-36-247-2024, https://doi.org/10.5194/ejm-36-247-2024, 2024
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To explore the compositional constraints on Cl incorporation into amphiboles, which can be used to characterize transient brines, amphiboles were synthesized with a broad range of Cl concentrations. Amphibole Cl was found to be dependent on the Fe2+,3+ content, but not the tetrahedral Al content or K / Na ratio. Cl incorporation was found to contract the unit cell along a and expand it along b and c. Molar volumes were derived for endmember Cl-amphiboles using multivariate regressions.
Fabrice Dal Bo, Henrik Friis, Marlina A. Elburg, Frédéric Hatert, and Tom Andersen
Eur. J. Mineral., 36, 73–85, https://doi.org/10.5194/ejm-36-73-2024, https://doi.org/10.5194/ejm-36-73-2024, 2024
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We report the description and the characterization of a new mineral species, found in a rock sample from the geological formation called the Pilanesberg Complex, South Africa. This is a silicate mineral that contains a significant amount of sodium, calcium, iron, titanium and fluorine. Its atomic structure shows that it is related to other wöhlerite-group minerals. This work provides new insights into the crystallization conditions that ruled the formation of the Pilanesberg complex.
Juraj Majzlan, Anna Reichstein, Patrick Haase, Martin Števko, Jiří Sejkora, and Edgar Dachs
Eur. J. Mineral., 36, 31–54, https://doi.org/10.5194/ejm-36-31-2024, https://doi.org/10.5194/ejm-36-31-2024, 2024
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Minerals formed by weathering of toxic materials, of either natural or human origin, act as storage containers for toxic elements. In this work, we investigated properties of common minerals which store and release arsenic in the environment. The data presented here will allow for improved modeling of the polluted sites and for better remediation strategies that could be applied to minimize the impact of the pollution on the environment.
Silvia Fornasaro, Paola Comodi, Laura Crispini, Sandro Zappatore, Azzurra Zucchini, and Pietro Marescotti
Eur. J. Mineral., 35, 1091–1109, https://doi.org/10.5194/ejm-35-1091-2023, https://doi.org/10.5194/ejm-35-1091-2023, 2023
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Using an innovative multi-analytical approach, we investigated the trace elements composition of spinel-group minerals in different ultramafic rocks from the Voltri Massif (Central Liguria, NW Italy). The knowledge of the trace elements within these minerals has an interesting implication both in petrological, mineralogical, and geochemical studies as well as environmental fields, since these elements can be potentially toxic and released into the environment during weathering processes.
Alessandra Altieri, Federico Pezzotta, Giovanni B. Andreozzi, Henrik Skogby, and Ferdinando Bosi
Eur. J. Mineral., 35, 755–771, https://doi.org/10.5194/ejm-35-755-2023, https://doi.org/10.5194/ejm-35-755-2023, 2023
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Elba tourmaline crystals commonly display a sharp transition to dark colors at the analogous termination, but the mechanisms leading to the formation of such terminations are unclear. Here we propose a general genetic model in which, as a consequence of a pocket rupture event, chemical alteration of early formed Fe-/Mn-rich minerals in the enclosing pegmatite was responsible for the release of Fe and/or Mn in the geochemical system, allowing the formation of the late-stage dark terminations.
Nadia Curetti and Alessandro Pavese
Eur. J. Mineral., 35, 373–382, https://doi.org/10.5194/ejm-35-373-2023, https://doi.org/10.5194/ejm-35-373-2023, 2023
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Paramontroseite is a V dioxide (a = 4.8960(14) Å, b = 9.395(3) Å, c = 2.9163(5) Å, V = 134.14(6) Å3; space group Pbnm). The sample under investigation (Prachovice mine, Czech Republic) bears 20 wt % of Fe2O3, and the Fe atoms occupy tetrahedral sites arranged in the
emptychannel along z. Thermal expansion is anisotropic. At T > 350 °C, paramontroseite decomposes and two new phases form: V2O5 (V-pentoxide) and V4Fe2O13 (Fe-tetrapolyvanadate).
Lara Sulcek, Bernd Marler, and Michael Fechtelkord
Eur. J. Mineral., 35, 199–217, https://doi.org/10.5194/ejm-35-199-2023, https://doi.org/10.5194/ejm-35-199-2023, 2023
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Synthetic lepidolites and Li-muscovites were characterised by nuclear magnetic resonance (NMR) spectroscopy and X-ray diffraction. Both Li and F / OH content influence the occurrence of the impurity phases. A solid solution series exists for lepidolites with polylithionite and trilithionite as endmembers but does not between trilithionite and muscovite. NMR investigations indicate there is a preference for incorporating fluorine and OH groups near Li-rich and Al-rich environments, respectively.
Natalia Dubrovinskaia, Maria Messingschlager, and Leonid Dubrovinsky
Eur. J. Mineral., 34, 563–572, https://doi.org/10.5194/ejm-34-563-2022, https://doi.org/10.5194/ejm-34-563-2022, 2022
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In this work we report a new locality for the rare mineral hydroromarchite, Sn3O2(OH)2. It was found not in a submarine environment but in soil at the Saint James Church archaeological site in Creussen, Germany. A tin artefact (a tin button) was exposed to weathering in soil for about 300 years. We solved and refined its structure based on single-crystal X-ray diffraction analysis.
Erich Keck, Ian E. Grey, Colin M. MacRae, Stephanie Boer, Rupert Hochleitner, Christian Rewitzer, William G. Mumme, A. Matt Glenn, and Cameron Davidson
Eur. J. Mineral., 34, 439–450, https://doi.org/10.5194/ejm-34-439-2022, https://doi.org/10.5194/ejm-34-439-2022, 2022
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First occurrences of the secondary phosphate minerals kenngottite, Mn32+Fe43+(PO4)4(OH)6(H2O)2; allanpringite, Fe33+(PO4)2(OH)3·5H2O; iangreyite, Ca2Al7(PO4)2(PO3OH)2(OH,F)15·8H2O; and nizamoffite, MnZn2(PO4)2(H2O)4, from the Hagendorf Süd pegmatite are reported, with characterisation of their crystal chemistry and phase associations.
Herbert Kroll, Hans Ulrich Bambauer, and Horst Pentinghaus
Eur. J. Mineral., 32, 427–441, https://doi.org/10.5194/ejm-32-427-2020, https://doi.org/10.5194/ejm-32-427-2020, 2020
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Feldspars constitute about 60 % of the earth's crust. Na-feldspar, Na[AlSi3O8], is central to this mineral group. Its structural response to changing conditions of temperature and pressure is complicated. In particular, this applies to the distribution of Al and Si on the atomic sites of its crystal structure. We clarify how this distribution varies in thermodynamic equilibrium with external conditions and provide procedures that allow easy determination of the atomic distribution.
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Short summary
The structure of beryl has been a topic of research for decades but is still not entirely understood. This especially applies to substitutions by Fe ions and the occupation of the channels of beryl by H2O and alkalis. The growing amount of studies makes it difficult to gain an overview on these topics. Therefore, this article reviews the current consensus and debates found in the literature.
The structure of beryl has been a topic of research for decades but is still not entirely...
