Bortolanite

bortolanite

gotzenite

natrolite

pectolite

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Formula: Ca2(Ca1.5Zr0.5)Na(NaCa)Ti(Si2O7)2(OF)F2
Sorosilicate (Si2O7 groups), seidozerite supergroup, zirconium- and titanium- bearing mineral
Specific gravity: 3.195 calculated
Hardness: 5
Streak: Pale yellow to beige
Colour: Pale yellow to brown
Luminescence: Fluoresces weak yellow under UV (100–280 nm)
Environments

Volcanic igneous environments
Pegmatites

Bortolanite is a new mineral, approved in 2021 and to date (August 2022) reported only from the type locality.

Localities

At the type locality, the Bortolan quarry, Poços de Caldas, Poços de Caldas alkaline complex, Minas Gerais, Brazil, bortolanite occurs in the matrix of evolved subvolcanic phonolites and nepheline syenite pegmatites. Associated minerals include götzenite, nepheline, K-feldspar, aegirine, natrolite, analcime and manganese-bearing pectolite. Bortolanite is of late magmatic origin, and occurs as aggregates from 1 mm to 1.5 cm in size (CM 60.4.699-712).

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