Laachite
Laachite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula (Ca,Mn)₂Zr₂Nb₂TiFeO₁₄.
It crystallizes in the monoclinic crystal system (space group C2/c). It is a member of the Zirconolite structural group.
Key properties: specific gravity 5.417; Brownish red streak; Adamantine luster.
IMA symbol Laa, IMA status: approved, named in 2012.
Found in vesicular sanidinite volcanic ejectum.
It is found associated with Sanidine, allanite-(Ce), baddeleyite, haüyne, hedenbergite, intermediate members of the jacobsite-magnetite series, phlogopite, rhodonite, spessartine.
The name refers to the locality from which the first specimens were obtained.
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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