Formula: (Ba,K)4(Na,Ca)3Ti3(Si2O7)2(SO4)2O4
Origin of name: After locality; Yakut Inneli, the Inagli River, Yakutiya, Russia
Crystal system: Triclinic
Crystal class: 1
Twinning:
Unit cell:
Colour: Pale yellow, yellow-brown, brown
Diaphaneity:
Luster: Vitreous on cleavage, oily on fracture
Habit: Plates, crystal faces rare
Hardness: 4.5 to 5
Specific gravity: 3.96
Cleavage: 4; {010}, {110}, and {101} perfect, {001} distinct
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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