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Cualstibite

A valid IMA mineral species
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06421070014978998356348.jpg
Cualstibite-1T, etc.

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
04871870014977642894145.jpg
Cualstibite-1M

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
01735040015634355708798.jpg
Cualstibite-1T

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
06265540014953336277679.jpg
Cualstibite-1T, etc.

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
02341480014947002572934.jpg
Cualstibite-1M

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
07820300015284537589152.jpg
Cualstibite-1T

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
06421070014978998356348.jpg
Cualstibite-1T, etc.

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
04871870014977642894145.jpg
Cualstibite-1M

Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
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About CualstibiteHide

Formula:
Cu2Al(OH)6[Sb5+(OH)6]
Colour:
Blue-green
Lustre:
Vitreous
Hardness:
2
Crystal System:
Trigonal
Name:
Named for chemical composition (Cu, Al, Sb).
An extremely rare secondary antimony mineral closely related to zincalstibite (zinc analogue of cualstibite).
Two polytypes are known, cualstibite-1T (trigonal) and cualstibite-1M (monoclinic, formerly called cyanophyllite). The latter is the more common polytype.

Cualstibite Group, Hydrotalcite Supergroup.


Unique IdentifiersHide

Mindat ID:
1167
Long-form identifier:
mindat:1:1:1167:5
GUID
(UUID V4):
bd69aaf9-446d-4237-9aa4-ee9cc0bde508

IMA Classification of CualstibiteHide

Classification of CualstibiteHide

Strunz-mindat (2024):
4.FB.10

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
B : Hydroxides with OH, without H2O; insular octahedra
Dana 8th ed.:
44.3.10.1

44 : ANTIMONATES
3 : Miscellaneous
Hey's CIM Ref.:
24.1.4

24 : Antimonates and Antimonites
1 : Antimonates and antimonites of Na, Cu or Ag

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
CasbIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of CualstibiteHide

Lustre:
Vitreous
Transparency:
Transparent, Translucent
Colour:
Blue-green
Streak:
Bluish-white
Hardness:
2 on Mohs scale
Cleavage:
None Observed
No distinct cleavage
Fracture:
Conchoidal

Optical Data of CualstibiteHide

Type:
Uniaxial (-)
RI values:
nω = 1.672 nε = 1.644
Max Birefringence:
δ = 0.028
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Comments:
E +/- colorless, O light blue-green.
Comments:
Data for 1T polytype.

Chemistry of CualstibiteHide

Mindat Formula:
Cu2Al(OH)6[Sb5+(OH)6]
Elements listed:
Al, Cu, H, O, Sb - search for minerals with similar chemistry

Crystallography of CualstibiteHide

Polytype:
Formula:
Crystal System:
Class (H-M)
Space Group:
Space Group Setting:
Cell Parameters:
Ratio:
Unit Cell Volume (calc):
Z:
Cualstibite-1MCualstibite-1T
(Cu,Al)3(OH)6[Sb5+(OH)6]Cu2AlSb(OH)12
Monoclinic Trigonal 
2/m - Prismatic3 - Rhombohedral
P21/b P3
P21/c  
a = 9.938(1) Å, b = 8.890(1) Å, c = 5.493(1) Å
β = 102.90(1)°		a = 9.150(2) Å, c = 9.745(2) Å
a:b:c = 1.118 : 1 : 0.618a:c = 1 : 1.065
V 473.05 ųV 706.6 ų
23

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0004272CualstibiteBonaccorsi E, Merlino S, Orlandi P (2007) Zincalstibite, a new mineral, and cualstibite: Crystal chemical and structural relationships American Mineralogist 92 198-2032007Apuan Alps, Tuscany, Italy0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.89 Å(100)
4.17 Å(80)
2.65 Å(70)
2.33 Å(90)
1.793 Å(80)
Comments:
Data for 1T polytype.

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
47a : [Near-surface hydration of prior minerals]
47d : [Arsenates, antimonates, selenates, bismuthinates]
Stage 10b: Anthropogenic minerals<10 Ka
57 : Other minerals formed by human processes

Type Occurrence of CualstibiteHide

Type Locality:
ⓘ Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany
General Appearance of Type Material:
Columnar, trigonal crystals, up to 0.05 mm long, in voids; crustiform on barite and fluorite; radial aggregates; pseudomorphs after an unknown mineral; and massive.
Place of Conservation of Type Material:
Institute for Mineralogy and Petrography, University of Stuttgart, Stuttgart, Germany.
Geological Setting of Type Material:
A secondary mineral from oxidation of a hydrothermal, polymetallic barite–fluorite deposit.
Associated Minerals at Type Locality:
CornwalliteArsenogoyaziteGoethite
Reference:
Walenta, K. (1984) Cualstibit, ein neues Sekundärmineral aus der Grube Clara im mittleren Schwarzwald (BRD). [Cualstibite, a new secondary mineral from the Clara mine in the Central Black Forest (FRG)]. Chemie der Erde: 43: 255-260.

Synonyms of CualstibiteHide

Other Language Names for CualstibiteHide

German:Cualstibit
Spanish:Cualstibita

Relationship of Cualstibite to other SpeciesHide

Member of:
Cualstibite Group > Hydrotalcite Supergroup
Other Members of this group:
OmsiteNi2Fe3+(OH)6[Sb(OH)6]Trig. 3 : P3
ZincalstibiteZn2Al(OH)6[Sb5+(OH)6]Trig. 3 : P3

Common AssociatesHide

Associated Minerals Based on Photo Data:
10 photos of Cualstibite associated with AzuriteCu3(CO3)2(OH)2
4 photos of Cualstibite associated with BariopharmacosideriteBa0.5Fe3+4(AsO4)3(OH)4 · 5H2O
3 photos of Cualstibite associated with Cualstibite-1M(Cu,Al)3(OH)6[Sb5+(OH)6]
1 photo of Cualstibite associated with CornwalliteCu5(AsO4)2(OH)4
1 photo of Cualstibite associated with BaryteBaSO4
1 photo of Cualstibite associated with QuartzSiO2
1 photo of Cualstibite associated with Limonite
1 photo of Cualstibite associated with ChalcostibiteCuSbS2

Related Minerals - Strunz-mindat GroupingHide

4.FB.OmsiteNi2Fe3+(OH)6[Sb(OH)6]Trig. 3 : P3
4.FB.05Shakhovite[Hg2]2+Hg2+2[Sb3+O3](OH)3Mon. m
4.FB.10ZincalstibiteZn2Al(OH)6[Sb5+(OH)6]Trig. 3 : P3

Fluorescence of CualstibiteHide

In UV light:
Not florescent

Other InformationHide

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

Internet Links for CualstibiteHide

References for CualstibiteHide

Localities for CualstibiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Austria
 
  • Carinthia
    • Sankt Veit an der Glan District
      • Guttaring
        • Ratteingraben
[Cualstibite-1M] Auer et al. (2017)
  • Styria
    • Bruck-Mürzzuschlag District
      • Sankt Barbara im Mürztal
        • Veitsch
[Cualstibite-1M] Auer et al. (2017)
    • Leoben District
      • Kammern im Liesingtal
        • Seiz
          • Wolfsgruben (Wolfgruben)
Auer (2021)
France
 
  • Grand Est
    • Vosges
      • Épinal
        • Le Val-d'Ajol
          • Faymont
[Cualstibite-1M] Escande et al. (1973) +6 other references
[Cualstibite-1M] Escande et al. (1973) +6 other references
  • Occitanie
    • Aude
      • Narbonne
        • Padern
[Cualstibite-1M] Favreau et al. (2003)
  • Provence-Alpes-Côte d'Azur
    • Var
      • Toulon
        • Le Pradet
          • Cap Garonne Mine
Georges FAVREAU collection & EDX ...
Germany (TL)
 
  • Baden-Württemberg
    • Freiburg Region
      • Ortenaukreis
        • Oberwolfach
Walenta (1984) +1 other reference
  • North Rhine-Westphalia
    • Arnsberg
      • Märkischer Kreis
        • Iserlohn
          • Letmathe
            • Helmke quarry nature reserve
[Cualstibite-1M] Schnorrer-Köhler (1986) +1 other reference
  • Rhineland-Palatinate
    • Altenkirchen
      • Kirchen (Sieg)
        • Niederfischbach
[Cualstibite-1M] Schnorrer-Köhler (1989) +1 other reference
Greece
 
  • Attica
    • East Attica
      • Lavreotiki
        • Lavrion Mining District
          • Km 3
            • Kaminiza mines
[Cualstibite-1M] Rieck et al. (2022)
Italy
 
  • Friuli Venezia Giulia
    • Udine Province
Ciriotti et al. (2006) +1 other reference
      • Forni Avoltri
Ciriotti et al. (2006)
  • Tuscany
    • Massa-Carrara Province
Guastoni et al. (2018)
Luxembourg
 
  • Canton Wiltz
    • Goesdorf
Philippo et al. (2018)
Norway
 
  • Nordland
    • Narvik
Husdal (2021)
Slovakia
 
  • Banská Bystrica Region
    • Banská Bystrica District
      • Špania Dolina
        • Špania Dolina deposit
Martin Števko (unpublished, PXRD and EMPA-WDS confirmed)
South Africa
 
  • Northern Cape
    • Namakwa District Municipality
[Cualstibite-1M] Cairncross (2004)
Spain
 
  • Catalonia
    • Girona
      • Ribes de Freser
        • Vall de Ribes mining district
Joan Rosell et al. (2022)
Switzerland
 
  • Valais
    • Sierre
      • Anniviers
        • Saint-Luc
[Cualstibite-1M] Ansermet (2012) +2 other references
Rick Turner (confirmed by XRD and EDX)
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