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Mineralogical ClassificationToledoite published

21st Jan 2024 12:33 UTCDavid Von Bargen Manager

Ma, Chi, Fernando Cámara, Luca Bindi, and William L. Griffin. 2024. "Toledoite, TiFeSi, a New Mineral from Inclusions in Corundum Xenocrysts from Mount Carmel, Israel" Crystals 14, no. 1: 96. https://doi.org/10.3390/cryst14010096

https://www.mdpi.com/2073-4352/14/1/96

During our nanomineralogical investigation of melt inclusions in corundum xenocrysts from the Mount Carmel area, Israel, seven new oxide and alloy minerals have been discovered since 2021. Herein, we report toledoite (TiFeSi; IMA 2022-036), a new alloy mineral. Toledoite occurs as irregular crystals 2–16 μm in size, with gupeiite (Fe₃Si), jingsuiite (TiB₂), ziroite (ZrO₂), osbornite (TiN), xifengite (Fe₅Si₃), and naquite (FeSi) in corundum Grain WG1124E-1. Toledoite has an empirical formula (Ti_0.83Cr_0.07Mn_0.06V_0.02)(Fe_0.96Mn_0.04)(Si_0.99P_0.04) and an orthorhombic Ima2 TiFeSi-type structure with the following cell parameters: a = 7.00(1) Å, b = 10.83(1) Å, c = 6.29(1) Å, V = 477(1) Å³, Z = 12. Toledoite is a high-temperature alloy phase, formed under extremely reduced conditions in melt pockets in corundum xenocrysts derived from the upper mantle beneath Mount Carmel in Israel. The name was given in honor of Vered Toledo, of Shefa Gems Ltd. for her support and for providing corundum xenocrysts from the Mount Carmel region for this investigation of new minerals.

21st Jan 2024 17:09 UTCUwe Kolitsch Manager

Mount Carmel

I wonder what happened to the dispute started with the paper mentioned in

https://www.mindat.org/mesg-621639.html

22nd Jan 2024 16:17 UTCEvgeny Galuskin

A proposal to discredit new minerals from Carmel was sent to the CNMNC commission in the fall of 2023. Still waiting for a decision...