| Chemical formula of sodium feld***r are as follows: Na2O, Al2O3, 6 sio2 its theory of chemical composition of Na2O: 11.8%;Al2O3:19.4%;SiO2:68.8%, sodium feld***r appearance is usually white, gray, hardness of 6-6.5, is 2.61 ~ 2.64 g/cm3 density, melting point is 1100 ℃ or so.The albite minerals are difficult to achieve the theoretical value of nature, feld***r chemical composition is close to its theoretical value, feld***r, the more pure, the better the quality.Sodium feld***r in the process of heating, melting point is 1100 ℃ its theory.And natural sodium feld***r, its melting point varies with different chemical composition change. |
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