| 词条 | Barrerite |
| 释义 |
| name = Barrerite | category = Zeolite | image = Barrerite-27538.jpg | imagesize = 260px | alt = | caption = Barrerite from Kuiu Island, Alaska, USA. | formula = (Na,K,Ca)2Al2Si7O18·6(H2O) | strunz = 9.GE.15 | color = White, pink | system = Orthorhombic | class = Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m) | symmetry = Amma | cleavage = Perfect | mohs = 3 - 4 | luster = Vitreous-glassy | diaphaneity = Transparent to translucent | streak = White | refractive = nα = 1.479 nβ = 1.485 nγ = 1.489 | opticalprop = Biaxial (-) | gravity = 2.13 | references = [1][2][3] }}Barrerite is a tectosilicate mineral and a member of the zeolite family. It is one of the rarer zeolites. It was named for Richard Barrer, a New Zealand-born chemist.[3] Barrerite crystal are white to pinkish, with a vitreous-glassy luster. The crystal system is orthorhombic and is flat and tabular in appearance. It has a Mohs hardness of 3 to 4 and its cleavage is perfect. Barrerite has a white streak and a density of 2.13. It was first described in 1974 for an occurrence in Sardinia at Sant' Efisio Tower on Cape Pula in Cagliari Province.[3] It has also been reported from Rocky Pass, Kuiu Island, Alaska, and a few other localities. References1. ^[https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Barrerite Mineralienatlas] {{Commons category|Barrerite|position=left}}{{silicate-mineral-stub}}2. ^http://webmineral.com/data/Barrerite.shtml Webmineral data 3. ^1 2 http://www.mindat.org/min-536.html Mindat.org 3 : Tectosilicates|Zeolites|Orthorhombic minerals |
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