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<p>is known as the mineral <a href="page.php?w=wurtzite">wurtzite</a>, although it also can be produced synthetically.  The transition from the sphalerite form to the wurtzite form occurs at around 1020&nbsp;<a href="page.php?w=%C2%B0C">°C</a>.</p>

<p><big>Applications</big></p>
<p><big>Luminescent material</big></p>
<p><a href="page.php?w=image%3A_ZnS_powders2.jpg">thumb</a>Zinc sulfide, with addition of a few <a href="page.php?w=parts_per_million">ppm</a> of a suitable <a href="page.php?w=activator_%28phosphor%29">activator</a>, exhibits strong <a href="page.php?w=phosphorescence">phosphorescence</a>.</p><p>
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