garronite-Ca
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Garronite-Ca is a fairly rare silicate mineral, from the zeolite, which has been found in a few dozen locations in the world. It was first found in the Glenariff Valley, Garron Plateau, County Antrim, Northern Ireland, and in some locations in Iceland. The name comes from the town of Garron, in Northern Ireland, which is consequently considered its type locality. The name initially used was that of Garronite, without subfixes, but the discovery in 2015 of a garronite with dominant sodium instead of calcium in the position of interchangeable cations made it necessary to use subfixes, remaining
Wikidata facts
- Image
- Garronit, Galboly, Garron Escarpment, Antrim Co., Irlandia Pn..jpg
Show 5 more facts
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 9.GC.05
- Nickel-Strunz 9th edition (updated 2009)
- 9.GC.05
- Commons category
- Garronite
- IMA Mineral Symbol
- Grn-Ca
- chemical formula
- Ca₃(Al₆Si₁₀O₃₂)·14H₂O
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Article
3 sectionsContents
- Physical and chemical properties
- Localities
- References
Garronite-Ca is a fairly rare silicate mineral, from the zeolite, which has been found in a few dozen locations in the world. It was first found in the Glenariff Valley, Garron Plateau, County Antrim, Northern Ireland, and in some locations in Iceland. The name comes from the town of Garron, in Northern Ireland, which is consequently considered its type locality. The name initially used was that of Garronite, without subfixes, but the discovery in 2015 of a garronite with dominant sodium instead of calcium in the position of interchangeable cations made it necessary to use subfixes, remaining as Garronite-Ca, to distinguish it from the new species, Garronite-Na.
== Physical and chemical properties == Garronite-Ca is generally found as masses and nodules with a finely fibrous internal structure, white in color, usually showing a concentric growth structure. This causes the nodules to present with a conchoidal fracture. It is very rare as defined crystals. When crystals appear, they usually show the faces corresponding to {101} and {011}.