Also known as IMA1983-090
Minasgeraisite-(Y) is a discredited mineral species in the gadolinite supergroup with the chemical formula . Typically appearing as minute, purplish-lavender rosettes in granitic pegmatites, it was first identified at the José Pinto quarry in 1986 in Jaguaraçu, Minas Gerais, Brazil. The mineral was named after its type locality and approved by the International Mineralogical Association (IMA). Subsequent crystallographic and chemical analyses of the type material, as well as of comparable specimens from Norway and Central Europe, led to the mineral's discreditation in 2023. It is now regarded
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Minasgeraisite-(Y) is a discredited mineral species in the gadolinite supergroup with the chemical formula . Typically appearing as minute, purplish-lavender rosettes in granitic pegmatites, it was first identified at the José Pinto quarry in 1986 in Jaguaraçu, Minas Gerais, Brazil. The mineral was named after its type locality and approved by the International Mineralogical Association (IMA). Subsequent crystallographic and chemical analyses of the type material, as well as of comparable specimens from Norway and Central Europe, led to the mineral's discreditation in 2023. It is now regarded as a bismuth- and manganese-rich variety of hingganite-(Y).
== Characteristics == Minasgeraisite-(Y) is typically purplish-lavender in color. It is transparent with a sub-vitreous, resinous, or dull luster and a pale purple streak. The mineral is brittle and has a specific gravity of 4.29. Minasgeraisite-(Y) has a hardness of 6–7 on the Mohs scale.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).