Szklaryite
An extremely rare arsenic-dominant dumortierite relative — the namesake of its own group.
Intro adapted from Wikipedia (CC BY-SA).
Szklaryite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula Al₆BAs³⁺₃O₁₅.
It crystallizes in the orthorhombic crystal system (space group Pnma). It is a member of the Dumortierite structural group.
Key properties: specific gravity 3.71.
IMA symbol Sky, IMA status: approved, named in 2012.
Found in the internal portion of a complex zoned granitic pegmatite.
It is found associated with Holtite, microcline, quartz, muscovite, spessartine, chrysoberyl, zircon, monazite-(Ce), cheralite, xenotime-(Y), Mn-rich fluor-, hydroxyl- and chlorapatite.
The name is derived from the locality (Szklary pegmatite) in Poland, where the first specimens were collected.