Seidozerite

Seidozerite is a sorosilicate from the seidozerite supergroup (a "titanium disilicate"). It was first described by Semenov, Kazakova and Simonov in 1958.^[2] Its chemical formula is Na₄MnZr₂Ti(Si₂O₇)₂O₂F₂ and its type locality is 'Pegmatite No. 58', Lake Seydozero, Lovozero massif, Kola peninsula, Murmansk Oblast.^[3]

Seidozerite
Seidozerite from 'Pegmatite No. 58', Lake Seydozero, Lovozero massif, Kola peninsula, Murmansk Oblast
General
Category	Sorosilicates
Formula	Na4MnZr2Ti(Si2O7)2O2F2
IMA symbol	Sdz[1]
Strunz classification	9.BE.25
Crystal system	Monoclinic
Crystal class	Prismatic (2/m) (same H-M symbol)
Space group	P2/c
Identification
References	[2][3]