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Dundasite and Crocoite.jpg
Dundasite (the white mineral) and crocoite from Dundas, Tasmania. Field of view is 5mm.
Category Carbonate mineral
(repeating unit)
PbAl2[(OH)2|CO3]2 • H2O
Strunz classification 5.DB.10
Crystal system Orthorhombic
Crystal class Dipyramidal (mmm)
H-M symbol: (2/m 2/m 2/m)
Space group Pbmm
Unit cell a = 9.08, b = 16.37
c = 5.62 [Å]; Z = 4
Color White to very pale blue; colorless in transmitted light
Crystal habit Acicular crystals typically in spherical aggregates and matted crusts
Cleavage Perfect On {010}
Mohs scale hardness 2
Luster Vitreous to silky
Streak White
Diaphaneity Transparent
Specific gravity 3.10 – 3.55
Optical properties Biaxial (-)
Refractive index nα = 1.603 nβ = 1.716 nγ = 1.750
Birefringence δ = 0.147
2V angle Measured: 30° to 40°, calculated: 54°
References [1][2][3]

Dundasite is a rare lead aluminium carbonate mineral. The mineral is named after the type locality, Dundas, Tasmania, Australia.[1] The mineral was first discovered in the Adelaide Proprietary Mine.[4] Dundasite was first described by William Frederick Petterd in 1893.[5]

Dundasite is an uncommon secondary mineral occurring in the oxidized zone of lead ore deposits.[2] It commonly overgrows crocoite. It may also be overgrown by yellow cerussite.[4] It may be associated with cerussite, plattnerite, azurite, malachite, pyromorphite, mimetite, beudantite, duftite, crocoite, gibbsite, allophane and limonite.[2]

Besides its type location on Tasmania, the mineral has also been found in New Zealand, Mainland Australia, China, Belgium, Germany, France, Greece, United Kingdom, Ireland, Italy, Austria, Czech Republic, Namibia, and the US.[1]


Media related to Dundasite at Wikimedia Commons

  1. ^ a b c "Dundasite mineral information and data". mindat.org. Retrieved May 2011.  Check date values in: |access-date= (help)
  2. ^ a b c "Handbook of Mineralogy: Dunasite" (PDF). RRUF Database. Retrieved May 2011.  Check date values in: |access-date= (help)
  3. ^ "Dundasite Mineral Data". Webmineral. Retrieved May 2011.  Check date values in: |access-date= (help)
  4. ^ a b Bottrill, Ralph (April 12, 2009). "Dundasite". Retrieved 2009-10-16. 
  5. ^ "Volume 14". The Mineralogical magazine and journal of the Mineralogical Society. Great Britain: Mineralogical Society. 1965.