A very rare zeolite, bought in 2015 at the Liège mineral show from zeolite specialist Zelimir Gabelica; ex Christian Rewitzer collection ex Dr. Hartel collection. Collection and photo Erik Vercammen. From: Seidozeritovyi pegmatite #1, Suoluaiv Mt, Lovozersky District, Murmansk Oblast, Russia. — Photo: Erik Vercammen · CC BY 3.0
Chabazite-Sr
Chabazite (UK: ) is a tectosilicate mineral series in the zeolite group, closely related to gmelinite, with the chemical formula M[Al2Si4O12]·6H2O, where M is one or more metal cations. Recognized minerals in the series include Chabazite-Ca, Chabazite-K, Chabazite-Na, and Chabazite-Sr, depending on the prominence of the indicated cation. Chabazite crystallizes in the triclinic crystal system with typically rhombohedral shaped crystals that are pseudo-cubic. The crystals are typically twinned, and both contact twinning and penetration twinning may be observed.
Intro adapted from Wikipedia (CC BY-SA).
Chabazite-Sr is an IMA-recognized mineral species in the silicate class, with the chemical formula (Sr,Ca)₂[Al₄Si₈O₂₄]·11H₂O.
It crystallizes in the hexagonal crystal system (space group R-3). It is a member of the Chabazite structural group.
Key properties: Mohs hardness 4–4.5; specific gravity 2.16; White streak; Vitreous luster; optically uniaxial.
IMA symbol Cbz-Sr, IMA status: approved, named in 1999.
Found in a K-feldspar and aegirine pegmatite veinlet in an alkaline massif.
It is found associated with Analcime, gonnardite, låvenite, vinogradovite, phillipsite, seidozerite, apatite, K-feldspar, aegirine.
Its name comes from the Greek chabazios, an ancient name of a stone. A suffix indicates the most abundant extra-framework cation.