Stilbite

Stilbite is the name of a series of <a href="/facts/Tectosilicate/WclrQW2I">tectosilicate</a> minerals of the <a href="/facts/Zeolite/SNrXy4v2">zeolite</a> group. Prior to 1997, stilbite was recognized as a <a href="/facts/Mineral/LkUFbNmv">mineral</a> species, but a reclassification in 1997 by the <a href="/facts/International_Mineralogical_Association/BzSmsAYQ">International Mineralogical Association</a> changed it to a series name, with the mineral species being named:

<ul><li>Stilbite-Ca</li>
<li>Stilbite-Na, sometimes also called <a href="/facts/Stiblite/1GchK14u">stiblite</a>: 325 </li></ul>
Stilbite-Ca, by far the more common of the two, is a hydrous calcium sodium and aluminium silicate, <a href="/facts/Sodium/eYuSPu2V">Na</a><a href="/facts/Calcium/hf252CC0">Ca</a>4(<a href="/facts/Silicon/cgWx0hdr">Si</a>27<a href="/facts/Aluminium/7wmR8jYE">Al</a>9)<a href="/facts/Oxygen/acyn6o8r">O</a>72·28(<a href="/facts/Hydrogen/BoYHjl0J">H</a>2O). In the case of stilbite-Na, sodium dominates over calcium. The species are visually indistinguishable, and the series name stilbite is still used whenever testing has not been performed.

Stilbite open-in-new

Stilbite