Tululite

tululite

spurrite

fluorellestadite

monteponite

Images

Formula: Ca₁₄(Fe³⁺,Al)(Al,Zn,Fe³⁺,Si,P,Mn,Mg)₁₅O₃₆
Oxide, zinc- and manganese- bearing mineral
Crystal System: Isometric
Specific gravity: 3.826 calculated
Hardness: 6½
Streak: White
Colour: Yellow with greenish tint
Luminescence: Non-fluorescent under UV
Solubility: Dissolves in 1.5 % hydrochloric acid
Environments

Metamorphic environments

Tululite is a relatively new mineral, approved in 2014 and to date (June 2023) reported only from Siwaga.

Localities

At the type locality, Tulul al Hammam, Siwaga, Lisdan-Siwaga Fault, Hashem region, Daba-Siwaqa complex, Transjordan Plateau, Amman Governorate, Jordan, tululite is an abundant accessory mineral in combustion metamorphic (800 to 850^oC) spurrite fluorellestadite marbles derived from bitumen-rich chalky marine sediments. Associated minerals include calcite, spurrite, fluorellestadite, zinc-rich periclase, lime-monteponite solid solution and zincite (HOM).
The tululite occurs in thin clusters as irregular grains with indented outlines (20 to 100 μm in size), having typical open-work textures (Mindat).

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