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Silicate

Abenakiite-(Ce)

Na₂₆Ce₆(Si₆O₁₈)(PO₄)₆(CO₃)₆(SO₂)O
Hardness4.5
Crystal systemHexagonal
ClassSilicate
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Abenakiite-(Ce)

Abenakiite-(Ce) is a mineral of sodium, cerium, neodymium, lanthanum, praseodymium, thorium, samarium, oxygen, sulfur, carbon, phosphorus, and silicon with a chemical formula Na26Ce6(SiO3)6(PO4)6(CO3)6(S4+O2)O. The silicate groups may be given as the cyclic Si6O18 grouping. The mineral is named after the Abenaki, an Algonquian Indian tribe of New England. Its Mohs scale rating is 4 to 5.

Intro adapted from Wikipedia (CC BY-SA).

Abenakiite-(Ce) is an IMA-recognized mineral species in the silicate class, with the chemical formula Na₂₆Ce₆(Si₆O₁₈)(PO₄)₆(CO₃)₆(SO₂)O.

It crystallizes in the hexagonal crystal system (space group R-3).

Key properties: Mohs hardness 4.5; specific gravity 3.24; refractive index 1.58; optically uniaxial.

IMA symbol Abk-Ce, IMA status: approved, named in 1991.

Index entry. This entry combines official IMA/RRUFF species data with published physical-property data and a Wikipedia introduction — a full written entry hasn’t been published yet. Browse more A minerals or help write this entry.