Colorless sharp hexagonal crystal of the extremely rare mineral swedenborgite (Na-Be-Sb oxide) from the type and only known locality worldwide, the famous Langban deposit (Sweden). — Photo: David Hospital · CC BY-SA 4.0
Swedenborgite
Swedenborgite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula NaBe₄Sb⁵⁺O₇.
It crystallizes in the hexagonal crystal system (space group P6_3mc).
Key properties: Mohs hardness 8; specific gravity 4.285; optically uniaxial.
IMA symbol Swe, grandfathered status — known before the IMA’s founding, named in 1924.
Found in skarn from a metamorphosed Fe–Mn orebody.
It is found associated with Bromellite, richterite, manganoan biotite, calcite, hematite.
The mineral was named to honor Emanuel Swedenborg (1688–1772), Swedish philosopher and theologian.