The product is irregular crystal block, colorless or white, transparent or translucent, glassy luster, slightly smooth or uneven surface, with fine longitudinal edges and white fine powder. It is hard and brittle, easy to smash, slightly fragrant, slightly sweet and extremely astringent. It is better to be large, colorless, transparent and free of impurities.
The ecological environment is often deteriorated by low-temperature sulfate solution in alkali feldspar, which is mostly produced in volcanic rocks, and its resources are distributed in Gansu, Hebei, Anhui, Fujian, Shanxi, Hubei, Zhejiang and other places.
Extended data:
Identification method
Take about 0.5g of this product, add 5ml of water, dissolve it, filter it, and test the filtrate as follows: take filtrate 1ml, and add sodium hydroxide test solution to generate white colloidal precipitate; Separation and precipitation can be dissolved in excess sodium hydroxide.
Take filtrate 1ml, and add lead acetate test solution to generate white precipitate; Separating, and dissolving the precipitate in ammonium acetate solution or sodium hydroxide solution. (Check sulfate)
Take platinum wire, moisten it with hydrochloric acid, dip it in the powder of this product, and burn it in a colorless flame, and the flame will be purple (see through blue glass). (Check potassium salt)