Låvenite

lavenite

zirconium

kochite

lorenzenite

Images

Formula: (Na,Ca)4(Mn2+,Fe2+)2(Zr,Ti,Nb)2(Si2O7)2(O,F)4
Sorosilicate (Si2O7 groups), wöhlerite group, zirconium, titanium and niobium bearing mineral
Specific gravity:
Hardness: 6
Streak: Yellowish white
Colour: Colourless to brownish yellow, brown, brownish red, orange-brown
Solubility: Slowly attacked by hydrochloric acid
Environments

Plutonic igneous environments
Pegmatites

Låvenite occurs in alkalic rocks and related pegmatites. Associated minerals include feldspars, nepheline, titanite, ilmenite, apatite, zircon, amphibole, biotite, eudialyte, catapleiite, astrophyllite, rinkite, lorenzenite and aegirine (HOM).

Localities

At the Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Quebec, Canada, låvenite occurs in a biotite-rich xenolith and in the contact of eudialyte-rich altered pegmatites (Dana).

On the Mount Hvide Ryg north slope, Werner Bjerge Complex, Sermersooq, Greenland, Denmark, låvenite has been found in a loose block of nepheline syenite associated with kochite (Minrec 35.4.354).

The type locality is Låven, Langesundsfjorden, Larvik, Vestfold og Telemark, Norway.

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