Mineral Information and Data:

Arsenbrackebuschite
Pb2(Fe3+,Zn)(AsO4)2(OH,H2O) [CNMNC approved formula]

Named as the arsenate analog of "brackebuschite.".

IMA status : Approved Species 1978 (IMA1977-014)
CLASSIFICATION 
Dana
(8th edition) :
40.02.08.02  
  (40) Hydrated Phosphates
  (40.02) where A++ (B++)2 (XO4) · x(H2O)
  (40.02.08) Brackebushite Group
  
Nickel-Strunz
(10th edition) :
08.BG.05
  (08) Phosphates, Arsenates, Vanadates
  (08.B) Phosphates, etc. with Additional Anions, without H2O
  (08.BG) With medium-sized and large cations, (OH, etc.):RO4 = 0.5:1
  
Crystal system: Monoclinic System
Point group (H-M): 2/m — prismatic
Crystal Habit: As tiny flat plates or laths, to 0.5 mm; also very fine-grained, massive.
Twinning: Complex, observed.
  
Color: Honey-yellow, yellow, brown, green
Diaphaneity: Semi-transparent
Luster: Resinous to adamantine
Hardness (Mohs): 4 - 5
Measured Density: 6.54 (calculated) g/cm3
Cleavage: Perfect on {010}
Streak: Pale brownish
  
Geologic Setting: In fissures in dolomite breccia in the oxidized zone of a dolostone-hosted hydrothermal polymetallic ore deposit (Tsumeb, Namibia); in a hydrothermal polymetallic barite–fluorite deposit (Clara mine, Germany).
Mineral Association: Beudantite, anglesite, mimetite, bayldonite, stolzite (Clara mine, Germany)
  

<<< BACK TO MINERAL SEARCH