Davyne
Davyne is an IMA-recognized mineral species in the silicate class, with the chemical formula [(Na,K)₆(SO₄)₀.₅Cl][Ca₂Cl₂][(Si₆Al₆O₂₄)].
It crystallizes in the hexagonal crystal system (space group P6_3). It is a member of the Cancrinite, Cancrinite-sodalite structural group.
Key properties: Mohs hardness 5.5–6; specific gravity 2.42–2.53; Vitreous luster; optically uniaxial.
IMA symbol Dvy, grandfathered status — known before the IMA’s founding, named in 1825.
Found in volcanic ejecta and in leucite-rich lavas.
It is found associated with Nepheline, leucite.
The name refers to the great English chemist, Sir Humphrey Davy (1778–1829).
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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