High-pressure minerals
Oliver Tschauner

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Investigation of the kieserite–szomolnokite solid-solution series, (Mg,Fe)SO₄·H₂O, with relevance to Mars: Crystal chemistry, FTIR, and Raman spectroscopy under ambient and martian temperature conditions
Dominik Talla and Manfred Wildner

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Intra-eruptive trachyte-phonolite transition: Natural evidence and experimental constraints on the role of crystal mushes
Marco Brenna, Alessio Pontesilli, Silvio Mollo, Matteo Masotta, Shane J. Cronin, Ian E.M. Smith, Mohammed Rashad Hassan Moufti, and Piergiorgio Scarlato

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Geochemistry of phosphorus and the behavior of apatite during crustal anatexis: Insights from melt inclusions and nanogranitoids
Chris Yakymchuk and Antonio Acosta-Vigil

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Static compression of Fe₄N to 77 GPa and its implications for nitrogen storage in the deep Earth
Helene Breton, Tetsuya Komabayashi, Samuel Thompson, Nicola Potts, Christopher McGuire, Sho Suehiro, Simone Anzellini, and Yasuo Ohishi

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A comparison between the stability fields of a Cl-rich scapolite and the end-member marialite
Kaléo M.F. Almeida and David M. Jenkins

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Electrical conductivity studies on silica phases and the effects of phase transformation
George M. Amulele, Anthony W. Lanati, and Simon M. Clark

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REE-, Sr-, Ca-aluminum-phosphate-sulfate minerals of the alunite supergroup and their role as hosts for radionuclides
Nicholas D. Owen, Nigel J. Cook, Mark Rollog, Kathy J. Ehrig, Danielle S. Schmandt, Rahul Ram, Joël Brugger, Cristiana L. Ciobanu, Benjamin Wade, and Paul Guagliardo

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Experimental quantification of the Fe-valence state at amosite-asbestos boundaries using acSTEM dual-electron energy-loss spectroscopy
Ruggero Vigliaturo, Simone Pollastri, Reto Gieré, Alessandro F. Gualtieri, and Goran Dražić

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Thermoelasticity, cation exchange, and deprotonation in Fe-rich holmquistite: Toward a crystal-chemical model for the high-temperature behavior of orthorhombic amphiboles
Roberta Oberti, Massimo Boiocchi, and Michele Zema

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Chemical and textural relations of britholite- and apatite-group minerals from hydrothermal REE mineralization at the Rodeo de los Molles deposit, Central Argentina
Melanie Lorenz, Uwe Altenberger, Robert B. Trumbull, Raúl Lira, Mónica López de Luchi, Christina Günter, and Sascha Eidner

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Bicapite, KNa₂Mg₂(H₂PV⁵⁺₁₄O₄₂)·25H₂O, a new polyoxometalate mineral with a bicapped Keggin anion from the Pickett Corral mine, Montrose County, Colorado, U.S.A.
Anthony R. Kampf, John M. Hughes, Barbara P. Nash, and Joe Marty

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Solubility of carbon and nitrogen in a sulfur-bearing iron melt: Constraints for siderophile behavior at upper mantle conditions
Alexander G. Sokol, Alexander F. Khokhryakov, Yuri M. Borzdov, Igor N. Kupriyanov, and Yuri N. Palyanov

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