<b>Wulfenite</b>
<b>Chemistry:</b> PbMoO4, Lead Molybdate
<b>Class:</b> Sulfates
<b>Uses:</b> A minor ore of molybdenum and as mineral specimens.
<b>Color</b> is red, orange, yellow, silver and white.
<b>Luster</b> is vitreous.
<b>Transparency:</b> Crystals are transparent to translucent.
<b>Crystal System</b> is tetragonal; 4/m or 4
<b>Crystal Habits</b> include very thin square or octahedral pinacoidal plates with pyramidal faces truncating just the edges of the crystal. At times the pyramids become prominant and psuedo-dipyramidal crystal habits are seen, sometimes because of twinning. Prismatic faces are also seen and can make psuedo-cubic crystals. Also encrusting and cavernous aggregates due to intergrowth of crystal plates.
<b>Cleavage</b> is perfect in one direction.
<b>Fracture</b> is conchoidal.
<b>Hardness</b> is 3.
<b>Specific Gravity</b> is approximately 6.8 (very heavy for translucent minerals)
<b>Streak</b> is white.
<b>Associated Minerals</b> are mimetite, limonite, smithsonite, vanadinite and galena.
<b>Other Characteristics:</b> index of refraction is 2.28-2.40 (very high, but typical of lead minerals).
<b>Notable Occurances</b> include Morocco; Tsumeb, Nambia; Mexico and Arizona and New Mexico, USA.
<b>Best Field Indicators</b> are crystal habit, color, density and luster.
Wulfenite - Jugoslavia
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Wulfenite con Mimetite - USA
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<b>(C) Chinellato Matteo</b> cubo = 1 cm.
