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MirabiliteMirabilite, also known as "Glauber's salt", is a hydrous sodium sulfate mineral: Na2SO4·10H2O. It is a vitreous, colorless to white monoclinic mineral which forms as an evaporite from sodium sulfate bearing brines. It is found around saline springs and along saline playa lakes. Associated minerals include gypsum, halite, thenardite, trona, glauberite, and epsomite. Additional recommended knowledgeMirabilite is unstable and quickly dehydrates in dry air, the prismatic crystals turning into a white powder (Na2SO4). Mirabilite is soft with a hardness of 1.5–2, and has a low specific gravity of 1.49. Thenardite (Na2SO4) is an orthorhombic anhydrous sodium sulfate mineral found in volcanic caves on Mt. Etna, Italy. Thenardite absorbs water and converts to mirabilite. Mirabilite is used as a purgative in the traditional Chinese materia medica; in Mandarin it is called máng xiāo. References
Categories: Sodium minerals | Sulfate minerals |
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Mirabilite". A list of authors is available in Wikipedia. |