Brand : REFSAN
Price : 15,13TL


Ulexite (NaCaB5O6(OH)6·5H2O, (hydrated sodium calcium borate hydroxide), sometimes known as TV rock, is a mineral occurring in silky white rounded crystalline masses or in parallel fibers. The natural fibers of ulexite conduct light along their long axes, by internal reflection. Ulexite was named for the German chemist Georg Ludwig Ulex (1811–1883) who first discovered it.

Ulexite is a structurally complex mineral, with a basic structure containing chains of sodium, water and hydroxide octahedra. The chains are linked together by calcium, water, hydroxide and oxygen polyhedra and massive boron units. The boron units have a formula of [B5O6(OH)6]3– and a charge of −3. They are composed of three borate tetrahedra and two borate triangular groups.

It melts much better than colemanite to a bubble-free transparent clear glass and does so below cone 06. It is very clean and consistent. Its potential in ceramics has not be explored.

This material is a candidate in the recipes of materials substituting for Gerstley Borate (Colemanite).


Chemical Formula : NaCaB5O9 .8H2O
Crystal System : Triclinic
Cyrstal Form : Needle type cyrstal usually; like cotton ball form
Rigidity :  2.5
Specific Weight : 1.955
Color and Transparency : White, colorless, silky, transparent
Brightness : Glassy


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