Seeking the most hydrous, primitive arc melts: The glass is half full
Matthew Steele-MacInnis

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Hydrous LABZ beneath a subduction zone was reconstructed for the first time
Eiichi Takahashi

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U, Th, and K partitioning between metal, silicate, and sulfide and implications for Mercury’s structure, volatile content, and radioactive heat production
Asmaa Boujibar, Mya Habermann, Kevin Righter, D. Kent Ross, Kellye Pando, Minako Righter, Bethany A. Chidester, and Lisa R. Danielson

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The stability of Fe₅O₆ and Fe₄O₅ at high pressure and temperature
Koutaro Hikosaka, Ryosuke Sinmyo, Kei Hirose, Takayuki Ishii, and Yasuo Ohishi

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Valleyite: A new magnetic mineral with the sodalite-type structure
Seungyeol Lee, Huifang Xu, Hongwu Xu, Ryan Jacobs, and Dane Morgan

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An analysis of the magnetic behavior of olivine and garnet substitutional solid solutions
Charles A. Geiger, Michael Grodzicki, and Edgar Dachs

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Pyrite trace-element and sulfur isotope geochemistry of paleo-mesoproterozoic McArthur Basin: Proxy for oxidative weathering
Indrani Mukherjee, Ross R. Large, Stuart Bull, Daniel G. Gregory, Aleksandr S. Stepanov, Janaína Ávila, Trevor R. Ireland, and Ross Corkrey

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Compressional behavior and spin state of δ-(Al,Fe)OOH at high pressures
Itaru Ohira, Jennifer M. Jackson, Natalia V. Solomatova, Wolfgang Sturhahn, Gregory J. Finkelstein, Seiji Kamada, Takaaki Kawazoe, Fumiya Maeda, Naohisa Hirao, Satoshi Nakano, Thomas S. Toellner, Akio Suzuki, and Eiji Ohtani

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Reconstruction of the lithosphere-asthenosphere boundary zone beneath Ichinomegata maar, Northeast Japan, by geobarometry of spinel peridotite xenoliths
Yuto Sato and Kazuhito Ozawa

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High-pressure phase stability and elasticity of ammonia hydrate
Xinyang Li, Weigang Shi, Xiaodi Liu, and Zhu Mao

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A multi-methodological study of kurnakovite: A potential B-rich aggregate
G. Diego Gatta, Alessandro Guastoni, Paolo Lotti, Giorgio Guastella, Oscar Fabelo, and Maria Teresa Fernandez-Diaz

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Identification of the occurrence of minor elements in the structure of diatomaceous opal using FIB and TEM-EDS
Peng Yuan, Dong Liu, Junming Zhou, Qian Tian, Yaran Song, Huihuang Wei, Shun Wang, Jieyu Zhou, Liangliang Deng, and Peixin Du

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Nixonite, Na₂Ti₆O₁₃, a new mineral from a metasomatized mantle garnet pyroxenite from the western Rae Craton, Darby kimberlite field, Canada
Chiara Anzolini, Fei Wang, Garrett A. Harris, Andrew J. Locock, Dongzhou Zhang, Fabrizio Nestola, Luca Peruzzo, Steven D. Jacobsen, and D. Graham Pearson

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Goldschmidtite, (K,REE,Sr)(Nb,Cr)O₃: A new perovskite supergroup mineral found in diamond from Koffiefontein, South Africa
Nicole A. Meyer, Michelle D. Wenz, James P.S. Walsh, Steven D. Jacobsen, Andrew J. Locock, and Jeffrey W. Harris

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Edscottite, Fe₅C₂, a new iron carbide mineral from the Ni-rich Wedderburn IAB iron meteorite
Chi Ma and Alan E. Rubin

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