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Chalconatronite

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Formula:
Na2Cu(CO3)2 · 3H2O
Colour:
Greenish-blue to pale blue
Specific Gravity:
2.27
Crystal System:
Monoclinic
Name:
For the chemical composition
Type Locality:
Rare secondary copper mineral.

Note: Chalconatronite can crystallise on the surface of archaeological Cu objects (artefacts) which have been treated with an aqueous Na2CO3 solution in order to stabilise them (Pollard et al., 1990).


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Classification of ChalconatroniteHide

Approved, 'Grandfathered' (first described prior to 1959)
5.CB.40

5 : CARBONATES (NITRATES)
C : Carbonates without additional anions, with H2O
B : With large cations (alkali and alkali-earth carbonates)
15.2.3.1

15 : HYDRATED NORMAL CARBONATES
2 : AmBn(XO3)p·xH2O, with (m+n):p > 1:1
11.2.4

11 : Carbonates
2 : Carbonates of Cu

Physical Properties of ChalconatroniteHide

Transparency:
Transparent
Colour:
Greenish-blue to pale blue
Comment:
Soft
Density:
2.27(3) g/cm3 (Measured)    2.31 g/cm3 (Calculated)
Comment:
Calculated from synthetic material

Optical Data of ChalconatroniteHide

Type:
Biaxial (+)
RI values:
nα = 1.483 nβ = 1.530 nγ = 1.576
2V:
Measured: 70° , Calculated: 86°
Max Birefringence:
δ = 0.093
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
none
Pleochroism:
Visible
Comments:
X= nearly colorless
Y= pale blue
Z= blue

Chemical Properties of ChalconatroniteHide

Formula:
Na2Cu(CO3)2 · 3H2O

Crystallography of ChalconatroniteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 9.7 Å, b = 6.09 Å, c = 13.82 Å
β = 91.92°
Ratio:
a:b:c = 1.593 : 1 : 2.269
Unit Cell V:
815.93 ų (Calculated from Unit Cell)
Morphology:
Fine grained crusts of pseudohexagonal plates or laths, massive, blebs, films.
Comment:
Synthetic

Type Occurrence of ChalconatroniteHide

Geological Setting of Type Material:
Originally found as alteration of bronze artifact.

Other Language Names for ChalconatroniteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Juangodoyite2 photos of Chalconatronite associated with Juangodoyite on mindat.org.
Aragonite1 photo of Chalconatronite associated with Aragonite on mindat.org.
Georgeite1 photo of Chalconatronite associated with Georgeite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

5.CB.05ThermonatriteNa2CO3 · H2OOrth. mmm (2/m 2/m 2/m) : Pmmm
5.CB.10NatronNa2CO3 · 10H2OMon. 2/m : P2/m
5.CB.15TronaNa3H(CO3)2 · 2H2OMon. 2/m
5.CB.20MonohydrocalciteCaCO3 · H2OTrig. 3 : P31
5.CB.25IkaiteCaCO3 · 6H2OMon.
5.CB.30PirssoniteNa2Ca(CO3)2 · 2H2OOrth. mm2 : Fdd2
5.CB.35GaylussiteNa2Ca(CO3)2 · 5H2OMon. 2/m : B2/b
5.CB.45BaylissiteK2Mg(CO3)2 · 4H2OMon.
5.CB.50TuliokiteNa6BaTh(CO3)6 · 6H2OTrig.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

11.2.1MalachiteCu2(CO3)(OH)2Mon. 2/m : P21/b
11.2.2AzuriteCu3(CO3)2(OH)2Mon. 2/m : P21/b
11.2.5CallaghaniteCu2Mg2(CO3)(OH)6 · 2H2OMon.

Other InformationHide

Notes:
Partialy soluble
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 ChalconatroniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Mineralogist: 40: 943.
Zeitschrift für Kristallographie: 148: 165-175.
Pollard, A. M.; Thomas, R. G.; Williams, P. A. (1990): Mineralogical changes arising from the use of aqueous sodium carbonate solutions for the treatment of archaeological copper objects. Studies in Conservation 35, 148-152.

Internet Links for ChalconatroniteHide

Localities for ChalconatroniteHide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Australia
 
  • Western Australia
    • Menzies Shire
      • Menangina Station
[MinRec 9:113]; Mineralogical Magazine 1977 41 : 37-41; Min Mag (1979) 43, 97-98; Matthew J. Sciberras, Peter Leverett, Peter A. Williams, David E. Hibbs, Peter J. Downes, Mark D. Welch and Anthony R. Kampf (2013) Paratacamite-(Ni,Cu3(Ni,Cu)Cl2(OH)6, a new mineral from the Carr Boyd Rocks mine, Western Australia. Australian Journal of Mineralogy 17:39-44
Austria
 
  • Carinthia
    • Gurktaler Alpen
      • Nock Mts
        • Erlacher Bock
Pichler (2009)
Canada
 
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
A. McDonald & RRUFF data
Chile
 
  • Tarapacá Region
    • Iquique Province
      • Santa Rosa-Huantajaya District
Maurizio Dini; Schlüter, J., T. Malcherek & D. Pohl (2007): "Sanrománite, from the Santa Rosa mine, Atacama desert, Chile, a new mineral of the burbankite group": Neues Jahrbuch fur Mineralogie, Abhandlungen, 183, 117-121.
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Karlovy Vary Region
      • Krušné Hory Mts (Erzgebirge)
Jakub Plasil
          • Jáchymov (St Joachimsthal)
            • Rovnost Mine (Werner Mine)
Plášil J., Hloušek J., Škoda R. (2013): Chalkonatronit, Na2Cu(CO3)2(H2O)3, ze žíly sv. Ducha, Jáchymov (Česká republika) [Chalconatronite, Na2Cu(CO3)2(H2O)3, from the „sv. Duch“ vein, Jáchymov (Czech Republic)]. Bull. mineral.-petrolog. Odd. Nár. Muz. (Praha) 21, 228-233.
Egypt (TL)
Science (1955) 122, 75-76
Germany
 
  • Hesse
    • Richelsdorf District
      • Nentershausen
        • Süß
          • Richelsdorf Smelter
S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1992
  • Lower Saxony
    • Harz
      • Braunlage
Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
      • Clausthal-Zellerfeld
        • Bockswies veins
          • Oberschulenberg
Lapis, 11 (1), 9-18+42
  • North Rhine-Westphalia
    • Sauerland
      • Meschede
        • Ramsbeck
Weiss: "Mineralienfundstellen, Deutschland West", Weise (Munich), 1990
T Thieme collection
  • Rhineland-Palatinate
    • Lahn valley
      • Bad Ems District
        • Braubach
Schnorrer-Köhler, G. & David, W. (1991): Die Blei- und Silberhütte Braubach und ihre Haldenminerale. Lapis, 16 (1), 38-49; 58 (in German).
Lapis, 16 (1), 38-53+58.
        • Frücht
[MinRec 18:365]
  • Saxony
    • Erzgebirge
Lapis 17(12), 24-33
Switzerland
 
  • Vaud (Waadt)
    • Bex
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): Mineralienlexikon der Schweiz. Wepf (Basel), p. 106.
USA
 
  • Colorado
    • San Miguel Co.
      • Slick Rock District
Minerals of Colorado (1997) Eckels, E. B.
  • Michigan
    • Houghton Co.
      • Centennial
Mineralogy of Michigan (E. W. Heinrich & G. W. Robinson)
Rocks & Minerals 82:276-297
    • Ontonagon Co.
      • White Pine
R&M 74:3 p160-176
  • Virginia
Minerals of Virginia, 1990 by R. V. Dietrich
Mineral and/or Locality  
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