Gatedalite
Gatedalite is an IMA-recognized mineral species in the silicate class, with the chemical formula ZrMn²⁺₂Mn³⁺₄O₈(SiO₄).
It crystallizes in the tetragonal crystal system (space group I4_1/acd). It is a member of the Braunite structural group.
Key properties: specific gravity 4.783; Submetallic luster.
IMA symbol Gtd, IMA status: approved, named in 2013.
Found in hausmannite-bearing skarn in association with a regionally-metamphosed Mn-Fe deposit.
It is found associated with Jacobsite, Mn-calcite, tephroite, Mn-phlogopite, långbanite, pinakiolite, oxyplumboroméite.
The mineral was named to honor amateur mineralogist Kjell Gatedal (b. 1947) from Nora, Örebro, Sweden, for his contributions to the mineralogy of Långban-type deposits.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
Browse more G minerals or help write this entry.