This is the peer-reviewed, final accepted version for American Mineralogist, published by the Mineralogical Society of America. The published version is subject to change. Cite as Authors (Year) Title. American Mineralogist, in press. DOI: https://doi.org/10.2138/am-2021-7932. http://www.minsocam.org/ 49 50 Chukochenite (Li0.5Al0.5)Al2O4, a new lithium oxyspinel mineral from the 51 Xianghualing skarn, Hunan Province, China 52 53 CAN RAO1*, XIANGPING GU2, RUCHENG WANG3, QUNKE XIA1, YUANFENG CAI3, CHUANWAN 54 DONG1, FRÉDÉRIC HATERT4, AND YANTAO HAO1 55 56 1 Key Laboratory of Geoscience Big Data and Deep Resource of Zhejiang Province, School of Earth 57 Sciences, Zhejiang University, Hangzhou 310027, China 58 2 School of Earth Sciences and Info-physics, Central South University, Changsha, 410083, China 59 3 State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing 60 University, Nanjing, 210046, China 61 4 Laboratoire de Minéralogie, B18, Université de Liège, B-4000 Liège, Belgium 62 *E-mail:
[email protected] 63 64 ABSTRACT 65 Chukochenite, (Li0.5Al0.5)Al2O4, is a new mineral species from the Xianghualing skarn, 66 Hunan Province, southern China. It occurs as subhedral to euhedral crystals up to 200 μm 67 across in the green rock of Xianghualing skarn, closely associated with fluorite, phlogopite, 68 chrysoberyl, margarite, chlorite, ferronigerite-2N1S, and zinconigerite-2N1S. The crystals are 69 colorless and transparent with vitreous luster. Chukochenite is brittle with irregular fracture, 70 has a Mohs hardness of 8, and shows light red fluorescence under 253.7 nm UV radiation and 71 light green fluorescence under 365 nm UV radiation.