stolzite

{{Infobox mineral | name = Stolzite | boxwidth = | boxbgcolor =#9c4f11 | boxtextcolor = #fff | image = Stolzite-t07-25b.jpg | imagesize = | alt = | caption = Stolzite, Broken Hill, Australia (size: 3.6 x 3.0 x 2.6 cm) | category = Tungstate minerals | formula = PbWO4 | IMAsymbol = Sz | molweight = | strunz = 7.GA.05 | dana = | system = Tetragonal | class = Dipyramidal (4/m) H-M symbol: (4/m) | symmetry = I41/a | unit cell = a = 5.461, c = 12.049 [Å]; Z = 4 | color = Reddish brown, brown, yellowish gray, smoky gray, straw-yellow, lemon-yellow; may be green, orange, red | colour = | habit = Crystals dipyramidal to tabular | twinning = | cleavage = Imperfect on {001}, indistinct on {011} | fracture = Conchoidal to uneven | tenacity = Brittle | mohs = 2.5–3 | luster = Resinous, subadamantine | streak = White | diaphaneity = Translucent to transparent | gravity = 8.34 | density = | polish = | opticalprop = Uniaxial (−) | refractive = nω = 2.270 nε = 2.180 – 2.190 | birefringence = δ = 0.090 | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = }}

Stolzite is a mineral, a lead tungstate; with the formula PbWO4. It is similar to, and often associated with, wulfenite which is the same chemical formula except that the tungsten is replaced by molybdenum. Stolzite crystallizes in the tetragonal crystal system and is dimorphous with the monoclinic form raspite. thumb|left|Stolzite crystal from the Darwin District, Inyo County, California (size: 2.0 × 1.7 × 1.6 cm) Lead tungstate crystals have the optical transparency of glass combined with much higher density (8.28 g/cm3 vs ~2.2 g/cm3 for fused silica). They are used as scintillators in particle physics because of their short radiation length (0.89 cm), low Molière radius (2.2 cm), quick scintillation response, and radiation hardness. Lead tungstate crystals are used in the Compact Muon Solenoid's electromagnetic calorimeter.