Stolzite





























































































Stolzite

Stolzite-t07-25b.jpg
Stolzite, Broken Hill, Australia (size: 3.6 x 3.0 x 2.6 cm)

General
Category
Tungstate minerals

Formula
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(repeating unit)

PbWO4
Strunz classification
7.GA.05
Crystal system
Tetragonal
Crystal class
Dipyramidal (4/m)
H-M symbol: (4/m)
Space group
I41/a
Unit cell
a = 5.461, c = 12.049 [Å]; Z = 4
Identification
Color
Reddish brown, brown, yellowish gray, smoky gray, straw-yellow, lemon-yellow; may be green, orange, red
Crystal habit
Crystals dipyramidal to tabular
Cleavage
Imperfect on {001}, indistinct on {011}
Fracture
Conchoidal to uneven
Tenacity
Brittle

Mohs scale
hardness

2.5 - 3
Luster
Resinous, subadamantine
Streak
White
Diaphaneity
Translucent to transparent
Specific gravity
8.34
Optical properties
Uniaxial (-)
Refractive index
nω = 2.270 nε = 2.180 - 2.190
Birefringence
δ = 0.090
References
[1][2][3][4]

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.[3]


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.[5] Lead tungstate crystals are used in the Compact Muon Solenoid's electromagnetic calorimeter.[5]


It was first described in 1820 by August Breithaupt, who called it Scheelbleispath and then by François Sulpice Beudant in 1832, who called it scheelitine. In 1845, Wilhelm Karl Ritter von Haidinger coined the name stolzite for an occurrence in Krusne Hory (Erzgebirge), Czech Republic, naming it after Joseph Alexi Stolz of Teplice in Bohemia.[3][4] It occurs in oxidized hydrothermal tungsten-lead ore deposits typically in association with raspite, cerussite, anglesite, pyromorphite and mimetite.[2]



See also



  • List of minerals

  • List of minerals named after people



References





  1. ^ Mineralienatlas


  2. ^ ab Handbook of Mineralogy


  3. ^ abc Mindat.org


  4. ^ ab Wevmineral data


  5. ^ ab The CMS Collaboration (2006). "Chapter 1. Introduction". CMS Physics : Technical Design Report Volume 1: Detector Performance and Software. CERN. p. 14. ISBN 9789290832683. CMS has chosen lead tungstate scintillating crystals for its ECAL. These crystals have short radiation (X0 = 0.89 cm) and Moliere (2.2 cm) lengths, are fast (80% of the light is emitted within 25 ns) and radiation hard (up to 10 Mrad)..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""""'""'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}



Mellor, J. W. "A Comprehensive Treatise on Inorganic and Theoretical Chemistry," Vol.11, Longmans, Green and Co., London, 1931, p. 792.




Stolzite crystal from the Darwin District, Inyo County, California (size: 2.0 x 1.7 x 1.6 cm)















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