Tululite
Tululite is an IMA-recognized mineral species in the silicate class, with the chemical formula Ca₁₄(Fe³⁺,Al)(Al,Zn,Fe³⁺,Si,P,Mn,Mg)₁₅O₃₆.
It crystallizes in the cubic crystal system (space group F23).
Key properties: Mohs hardness 6.5; specific gravity 3.826; White streak; Vitreous luster.
IMA symbol Tlu, IMA status: approved, named in 2014.
An abundant accessory mineral in combustion metamorphic (800-850 flC) spurrite- fluorellestadite marbles derived from bitumen-rich chalky marine sediments.
It is found associated with Calcite, spurrite, fluorellestadite, Zn-rich periclase, lime-monteponite solid solution, zincite.
The name commemorates Tulul Al Hammam (Arabic for “Pigeon Hills”) where the mineral was found.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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