¹Ustinova, G.K.,¹Alexeev, V.A.
Geochemistry International 58, 487-499 Link to Article [DOI: 10.1134/S0016702920050110]
¹Vernadsky Institute of Geochemistry and Analytical Chemistry (GEOKhI), Russian Academy of Sciences, Moscow, 119991, Russian Federation

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¹Bellucci, J.J.,²Herd, C.D.K.,¹Whitehouse, M.J.,^1,3Nemchin, A.A.,¹Kenny, G.G.,¹Merle, R.E.
Chemical Geology 545, 119638 Link to Article [DOI: 10.1016/j.chemgeo.2020.119638]
¹Department of Geosciences, Swedish Museum of Natural History, Stockholm, SE-104 05, Sweden
²Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3, Canada
³School of Earth and Planetary Sciences (EPS), Curtin University, Perth, WA 6845, Australia

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¹Porfido, C.,²Manzari, P.,¹Allegretta, I.,¹Terzano, R.,³De Pascale, O.,³Senesi, G.S.
Talanta 217, 121114 Link to Article [DOI: 10.1016/j.talanta.2020.121114]
¹Dipartimento di Scienze del Suolo, della Pianta e degli Alimenti, Università degli Studi di Bari “Aldo Moro”, Via Amendola 165/A, Bari, 70126, Italy
²Agenzia Spaziale Italiana, via del Politecnico, Roma, 00133, Italy
³CNR – Istituto per la Scienza e Tecnologia dei Plasmi (ISTP) – Sede di Bari, Via Amendola 122/D, Bari, 70126, Italy

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^1,2Nemeth, P.
IUcrJ 7, 368-369 Link to Article [DOI: 10.1107/S2052252520005254]
¹Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2, Budapest, 1117, Hungary
²Department of Earth and Environmental Sciences, University of Pannonia, Egyetem út 10, Veszprém, 8200, Hungary

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¹Maksimova, A.A.,¹Petrova, E.V.,¹Chukin, A.V.,¹Oshtrakh, M.I.
Journal of Molecular Structure 1216, 128391 Link to Article [DOI: 10.1016/j.molstruc.2020.128391]
¹Institute of Physics and Technology, Ural Federal University, Ekaterinburg, 620002, Russian Federation

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¹Ray, D.,²Misra, S.,³Upadhyay, D.,⁴Newsom, H.E.,⁴Peterson, E.J.,⁵Dube, A.,⁶Satyanaryanan, M.
Journal of Earth Science 129, 118 Link to Article [DOI: 10.1007/s12040-020-1371-7]
¹Planetary Sciences Division, Physical Research Laboratory, Ahmedabad, 380 009, India
²Discipline of Geological Sciences, SAEES, University of KwaZulu-Natal, Durban, 4000, South Africa
³Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur, 721 302, India
⁴Institute of Meteoritics and Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM 87131, United States
⁵8A-264, Salt Lake, Kolkata, 700 091, India
fCSIR-National Geophysical Research Institute, Hyderabad, 500 007, India

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^1,2Ai-Cheng Zhang,¹Run-Lian Pang,³Naoya Sakamoto,^3,4,5Hisayoshi Yurimoto
American Mineralogist 105, 1021–1029 Link to Article [http://www.minsocam.org/MSA/AmMin/TOC/2020/index.html?issue_number=07]
¹State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China ²CAS Center for Excellence in Comparative Planetology, China
³3Isotope Imaging Laboratory, Creative Research Institution, Hokkaido University, Sapporo 001-0021, Japan
⁴Department of Natural History Sciences, Hokkaido University, Sapporo 060-0810, Japan
⁵Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Kanagawa 252-5210, Japan
Copyright: The Mineralogical Society of America

“Cr-Zr-Ca armalcolite” is a mineral originally found in Apollo samples five decades ago. However, no structural information has been obtained for this mineral. In this study, we report a new occurrence of “Cr-Zr-Ca armalcolite” and its associated mineral assemblage in an Mg-suite lithic clast (Clast-20) from the brecciated lunar meteorite Northwest Africa 8182. In this lithic clast, plagioclase (An = 88–91), pyroxene (Mg#[Mg/(Mg+Fe)] = 0.87–0.91) and olivine (Mg# = 0.86–0.87) are the major rock-forming minerals. Armalcolite and “Cr-Zr-Ca armalcolite” are observed with other minor phases including ilmenite, chromite, rutile, fluorapatite, merrillite, monazite, FeNi metal, and Fe-sulfide. Based on 38 oxygen atoms, the chemical formula of “Cr-Zr-Ca armalcolite” is (Ca0.99Na0.01)S1.00(Ti14.22Fe2.06Cr2.01 Mg1.20Zr0.54Al0.49Ca0.21Y0.05Mn0.04Ce0.03Si0.03La0.01Nd0.01Dy0.01)S20.91O38. Electron backscatter diffraction (EBSD) results reveal that the “Cr-Zr-Ca armalcolite” has a loveringite R3 structure, differing from the armalcolite Bbmm structure. The estimated hexagonal cell parameters a and c of “Cr-Zr-Ca ar- malcolite” are 10.55 and 20.85 Å, respectively. These structural and compositional features indicate that “Cr-Zr-Ca armalcolite” is loveringite, not belonging to the armalcolite family. Comparison with “Cr-Zr-Ca armalcolite” and loveringite of other occurrences implies that loveringite might be an important carrier of rare earth elements in lunar Mg-suite rocks. The compositional features of pla- gioclase and mafic silicate minerals in Clast-20 differ from those in other Mg-suite lithic clasts from Apollo samples and lunar meteorites, indicating that Clast-20 represents a new example of diverse lunar Mg-suite lithic clasts.

¹Hu, J.,¹Asimow, P.D.,¹Ma, C.,^2,3Bindi, L.
IUCrJ 7, 434-444 Link to Article [DOI: 10.1107/S2052252520002729]
¹Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, United States
²Dipartimento di Scienze della Terra, Università Degli Studi di Firenze, Firenze, I-50121, Italy
³Istituto di Geoscienze e Georisorse, Consiglio Nazionale Delle Ricerche, Firenze, I-50121, Italy

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¹Jakubek, R.S.,²Fries, M.D.
Journal of Raman Spectroscopy (in Press) Link to Article [DOI: 10.1002/jrs.5887]
¹Astromaterials Research and Exploration Science (ARES) Division, Jacobs JETS Contract, NASA-JSC, Houston, TX, United States
²NASA Astromaterials Acquisition and Curation Office, NASA Johnson Space Center, Houston, TX, United States

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¹Aydan, Ö.,¹Ito,¹T.,¹Tokashiki, N.,¹Kodate, S.
Rock Mechanics for Natural Resources and Infrastructure Development- Proceedings of the 14th International Congress on Rock Mechanics and Rock Engineering, ISRM 2019, 1085-1092 Link to Article [ISBN: 978-036742284-4]
¹Department. Of Civil Engineering, University of the Ryukyus, Okinawa, Nishihara, Japan

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