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Bechererite

This page kindly sponsored by Branko Rieck
Karl Becherer
Formula:
(Zn,Cu)6Zn2(SO4,HSiO4)2(OH)12
System:
Trigonal
Colour:
Light green, Ice Blue, ...
Lustre:
Vitreous
Hardness:
2 - 3
Name:
Named in honour of Dr. Karl Becherer (17.4.1926 - 17.2.2014), mineralogist at the University of Vienna, Austria.
There is a new secondary slag phase closely related to bechererite, but without SiO4 groups (U. Kolitsch, 2010; to be published).

Classification of Bechererite

Approved 1994
7.DD.55

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
D : With only medium-sized cations; sheets of edge-sharing octahedra
Dana 7th ed.:
4.0.0.0
mindat.org URL:
http://www.mindat.org/min-593.html
Please feel free to link to this page.

First Recorded Occurrence of Bechererite

Physical Properties of Bechererite

Vitreous
Colour:
Light green, Ice Blue, Colourless
Streak:
White
Hardness (Mohs):
2 - 3

Crystallography of Bechererite

Crystal System:
Trigonal
Class (H-M):
3 - Pyramidal
Space Group:
P3
Cell Parameters:
a = 8.319(2) Å, c = 7.377(1) Å
Ratio:
a:c = 1 : 0.887
Unit Cell Volume:
V 442.13 ų (Calculated from Unit Cell)
Z:
1
Morphology:
Hemimorphic elongate trigonal pyramids.

Optical Data of Bechererite

Type:
Uniaxial (-)
RI values:
nω = 1.705 nε = 1.611
Max Birefringence:
δ = 0.094
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of Bechererite

Formula:
(Zn,Cu)6Zn2(SO4,HSiO4)2(OH)12
Essential elements:
All elements listed in formula:

Relationship of Bechererite to other Species

7.DD.05FelsőbányaiteAl4(SO4)(OH)10 · 4H2O
7.DD.10LangiteCu4(SO4)(OH)6 · 2H2O
7.DD.10PosnjakiteCu4(SO4)(OH)6 · H2O
7.DD.10WroewolfeiteCu4(SO4)(OH)6 · 2H2O
7.DD.15SpangoliteCu6Al(SO4)(OH)12Cl · 3H2O
7.DD.20KtenasiteZn(Cu,Zn)4(SO4)2(OH)6 · 6H2O
7.DD.25ChristeliteCu2Zn3(SO4)2(OH)6 · 4H2O
7.DD.30CampigliaiteMn2+Cu4(SO4)2(OH)6 · 4H2O
7.DD.30DevillineCaCu4(SO4)2(OH)6 · 3H2O
7.DD.30OrthoserpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2O
7.DD.30SerpieriteCa(Cu,Zn)4(SO4)2(OH)6 · 3H2O
7.DD.30NiedermayriteCdCu4(SO4)2(OH)6 · 4H2O
7.DD.30EdwardsiteCu3Cd2(SO4)2(OH)6·4H2O
7.DD.35Carrboydite[(Ni1-xAlx)(OH)2][SO4]x/2 · nH2O
7.DD.35Glaucocerinite(Zn1-xAlx)(OH)2(SO4)x/2 · nH2O
7.DD.35Honessite(Ni1-xFex3+)(OH)2[SO4]x/2 · nH2O
7.DD.35Hydrohonessite(Ni1-xFex3+)(OH)2[SO4]x/2 · nH2O
7.DD.35MotukoreaiteMg6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2O
7.DD.35Mountkeithite[(Mg1-xFex3+)(OH)2][SO4]x/2 · nH2O
7.DD.35ShigaiteMn6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2O
7.DD.35WermlanditeMg7Al2(OH)18[Ca(H2O)6][SO4]2 · 6H2O
7.DD.35WoodwarditeCu1-xAlx(OH)2[SO4]x/2 · nH2O
7.DD.35ZincaluminiteZn6Al6(SO4)2(OH)16 · 5H2O
7.DD.35Hydrowoodwardite(Cu1-xAlx)(OH)2[SO4]x/2 · nH2O
7.DD.35ZincowoodwarditeZn1-xAlx(OH)2[SO4]x/2 · nH2O
7.DD.35NatroglaucoceriniteNaxZn8-yAly(SO4)(x+y)/2(OH)16 · 6H2O
7.DD.35NikischeriteFe62+Al3(OH)18[Na(H2O)6][SO4]2 · 6H2O
7.DD.40Lawsonbauerite(Mn2+,Mg)9Zn4(SO4)2(OH)22 · 8H2O
7.DD.40Torreyite(Mg,Mn2+)72Mn22+Zn4(SO4)2(OH)22 · 8H2O
7.DD.45MooreiteMg92Mn2Zn4(SO4)2(OH)26 · 8H2O
7.DD.50Namuwite(Zn,Cu)4(SO4)(OH)6 · 4H2O
7.DD.60Ramsbeckite(Cu,Zn)15(SO4)4(OH)22 · 6H2O
7.DD.65VonbezingiteCa6Cu3(SO4)3(OH)12 · 2H2O
7.DD.70RedgilliteCu6(SO4)(OH)10 · H2O
7.DD.75ChalcoalumiteCuAl4(SO4)(OH)12 · 3H2O
7.DD.75Nickelalumite(Ni,Cu)Al4(SO4,(NO3)2)(OH)12 · 3H2O
7.DD.75KyrgyzstaniteZnAl4(SO4)(OH)12·3H2O
7.DD.80Guarinoite(Zn,Co,Ni)6(SO4)(OH,Cl)10 · 5H2O
7.DD.80Schulenbergite(Cu,Zn)7(SO4,CO3)2(OH)10 · 3H2O
7.DD.80Thérèsemagnanite(Co,Zn,Ni)6(SO4)(OH,Cl)10 · 8H2O
7.DD.80UM1992-30-SO:CCuHZn(Zn,Cu)7(SO4,CO3)2(OH)10 · 3H2O
7.DD.85MontetrisaiteCu6(SO4)(OH)10 · 2H2O
4.0.0.0Polymignite(Ca,Fe,Y,Th)(Nb,Ti,Ta,Zr)O4

Other Names for Bechererite

Name in Other Languages:

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Bechererite

Reference List:
Mineralogical Record: 27: 393.

Giester, G. and Rieck, B. (1996): Bechererite, (Zn,Cu)6Zn2(OH)13[(S,Si)(O,OH)4]2, a novel mineral species from the Tonopah-Belmont mine, Arizona: American Mineralogist 81, 244-248.

Hoffmann, Ch., Armbruster, Th., Giester, G (1997): Acentric structure (P3) of bechererite, Zn7Cu(OH)13[SiO(OH)3SO4]: American Mineralogist 82, 1014-1018.

Rust, S.A., Bell, R. & Green, D.I. (2003): The occurrence of bechererite in the British Isles. UK Journal of Mines and Minerals, 23, 37-38.

Internet Links for Bechererite

Localities for Bechererite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Australia
 
  • New South Wales
    • Yancowinna Co.
Elliott, P. (1997): Minerals of the slags from Broken Hill, New South Wales. Australian J. of Mineralogy 3 (1), 77-83.
M.E. Ciriotti, 2006 (EDS- and XRD-analysed)
Germany
 
  • North Rhine-Westphalia
    • Siegerland
      • Wilnsdorf
Mineralien-Welt 17, (4), 36-37
Italy
 
  • Liguria
    • Genova Province
      • Genova
        • Varenna Valley
Rivista Mineralogica Italiana, 22 (3), 39-41.
Romania
 
  • Bihor Co.
    • Brusturi
G.Koller,2009
UK
 
  • England
    • Cornwall
      • Mount's Bay District
        • Perranuthnoe
Bechererite from Leadhills, South Lanarkshire and the Charlotte United Mines, Perranuthnoe, Cornwall. UK Journal of Mines & Minerals pp7-8, No28, 2007.
    • Cumbria
      • North and Western Region (Cumberland)
        • Caldbeck Fells
UKJMM.23.2003
          • Roughton Gill
Pluth, J. J., Steele, I. M., Kampf, A. R. & Green, D. I. (2005): Redgillite, Cu6(OH)10(SO4)•H2O, a new mineral from Caldbeck Fells, Cumbria, England: description and crystal structure. Mineralogical Magazine, 69, 973-980.
Tindle, A.G. (2008) Minerals of Britian and Ireland
    • Strathclyde (Lanarkshire)
      • South Lanarkshire
        • Leadhills
          • Mine Hill-Broad Law
Bechererite From Leadhills, South Lanarkshire and the Charlotte United Mines, Perranuthnoe, Cornwall. UK Journal of Mines and Minerals pp7-8, No28, 2007.
  • Wales
    • Ceredigion (Dyfed; Cardiganshire)
      • Ceulanymaesmawr
        • Talybont
          • Nant-y-Moch Reservoir area
UKJMM.23.2003
UKJMM.23.2003
      • Trefeirig
        • Pen-bont Rhydybeddau
UKJMM.23.2003
      • Upper Llanfihangell-y-Creuddyn
        • Pontrhydygroes
UKJMM 17
    • Powys (Montgomeryshire)
      • Llangynog
S Rust collection
      • Machynlleth
        • Dylife
UKJMM.23.2003
USA
 
  • Arizona
    • Maricopa Co.
      • Big Horn Mts
        • Osborn District
          • Tonopah
            • Belmont Mountain
Giester, G. and B. Rieck (1996) Bechererite, (Zn,Cu)6Zn2(OH)13[(S,Si)(O,OH)4]2, a novel mineral species from the Tonopah-Belmont mine, Arizona, American Mineralogist: 81: 244-248. Grant, Raymond W., Richard A. Bideaux & Sidney A. Williams (2006), Minerals Added to the Arizona List 1995 to 2005: 1.
Mineral and/or Locality  
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