nabesite
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Nabesite is a rare silicate mineral of the zeolite group with the chemical formula Na2BeSi4O10·4(H2O). It occurs as colorless to white orthorhombic crystals in thin platy mica like sheets. It has the zeolite structure. Its Mohs hardness is 5 to 6 and its specific gravity is 2.16. The reported refractive index values are nα=1.499, nβ=1.507, and nγ=1.511.
Wikidata facts
- Subclass of
- phyllosilicates
- Named after
- silicon
Show 6 more facts
- IMA Mineral Symbol
- Nbs
- chemical formula
- Na₂BeSi₄O₁₀ * 4H₂O
- Nickel-Strunz 9th edition (updated 2009)
- 9.EA.65
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 9.EA.65
- type locality (geology)
- Kvanefjeld
- crystal system
- orthorhombic crystal system
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Nabesite is a rare silicate mineral of the zeolite group with the chemical formula Na2BeSi4O10·4(H2O). It occurs as colorless to white orthorhombic crystals in thin platy mica like sheets. It has the zeolite structure. Its Mohs hardness is 5 to 6 and its specific gravity is 2.16. The reported refractive index values are nα=1.499, nβ=1.507, and nγ=1.511.
It was discovered in the Ilimaussaq intrusive complex, of southwest Greenland, and first recognized in 2000. It occurs in tugtupite-bearing albitite, a rare highly alkaline igneous rock.
Excerpted from Wikipedia’s “nabesite” article, available under the CC BY-SA 4.0 licence.