Davinciite
A variety of Eudialyte group
What is Davinciite?
Davinciite is a very rare mineral of the eudialyte group, with the simplified formula Na12K3Ca6Fe3Zr3(Si26O73OH)Cl2. The formula given does not show the presence of cyclic silicate groups. The mineral was named after Leonardo da Vinci to refer to the atypical geometrical forms he tended to use, compared by the authors of the mineral description to the atypical (not ideally centrosymmetrical) geometry of the Davinciite structure. The other quite atypical feature of Davinciite is its lavender colour, while the typical eudialyte is rather pink or red.
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Key Characteristics
Formation of Davinciite
Davinciite was discovered in hyperagpaitic (highly alkaline) pegmatite at Mt. Rasvmuchorr, Khibiny massif, Kola Peninsula, Russia. Aegirine, delhayelite, nepheline, potassium feldspar, shcherbakovite, sodalite (silicates), djerfisherite, rasvumite (sulfides), nitrite, nacaphite, and villiaumite are associated minerals.
Quick Facts
Physical Properties
- Color
- Dark lavender
- Hardness (Mohs)
- 5
- Density
- 2.848 g/cm³
- Streak
- White
Chemical Properties
- Chemical Formula
- Na12K3Ca6Fe2+3Zr3(Si26O73OH)Cl2
- Elements
- Ca, Cl, Fe, H, K, Na, O, Si, Zr
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