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January 2019

 
The image was submitted by John Sprat, Natural History Museum, London and John A. Jaszczak, Michigan Technological University, USA

Electron Probe Microanalysis of merelaniite, a newly discovered mineral
The CAMECA SX 100 Microprobe at the Natural History Museum, London was used to characterize the chemical composition of merelaniite, a new molybdenum-essential member of the cylindrite group, from the Merelani Tanzanite Deposit, Lelatema Mountains, Manyara Region, Tanzania. Merelaniite was selected “Mineral of the Year” for 2016 in an annual competition run by the International Mineralogical Association.

Merelaniite, Mo4Pb4VSbS15, a New Molybdenum-Essential Member of the Cylindrite Group, from the Merelani Tanzanite Deposit, Lelatema Mountains, Manyara Region, Tanzania. John A. Jaszczak, Michael S. Rumsey, Luca Bindi, Stephen A. Hackney, Michael A.Wise, Chris J. Stanley and John Spratt. Minerals 6(4), 115 (2016).