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Chalconatronite

A valid IMA mineral species - grandfathered
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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).


Unique Identifiers

First published:
1955
Type description reference:
Frondel, C., Gettens, R.J. (1955) Chalconatronite, a new mineral from Egypt. Science: 122: 75-76.

Classification of Chalconatronite

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

Dana 8th ed.:
15.2.3.1

15 : HYDRATED NORMAL CARBONATES
2 : AmBn(XO3)p·xH2O, with (m+n):p > 1:1
Hey's CIM Ref.:
11.2.4

11 : Carbonates
2 : Carbonates of Cu

Mineral Symbols
Surface Relief:
Moderate
Dispersion:
none
Optical Extinction:
Z ⊥ flattening; Y ‖ elongation; Z ∧ c = very small.
Pleochroism:
Strong
Comments:
X= nearly colorless
Y= pale blue
Z= blue

Chemistry of Chalconatronite

Crystallography of Chalconatronite
General Appearance of Type Material:
Fine-grained, greenish-blue crust,
Place of Conservation of Type Material:
Canadian Geological Survey, Ottawa, Ontario, Canada, 17254.
Harvard University, Cambridge, Massachusetts, USA, 105297.
National Museum of Natural History, Washington, D.C., USA, 112695.
Geological Setting of Type Material:
Originally found as alteration of bronze artifacts.
Associated Minerals at Type Locality:
AtacamiteCuprite
Reference:
Frondel, C., Gettens, R.J. (1955) Chalconatronite, a new mineral from Egypt. Science: 122: 75-76.

Other Language Names for Chalconatronite

Common AssociatesMon. 2/m :B2/b5.CB.05ThermonatriteNa2CO3 · H2OOrth.mmm(2/m2/m2/m) :Pmmm5.CB.10NatronNa2CO3 · 10H2OMon. 2/m :P2/m5.CB.15TronaNa3H(CO3)2 · 2H2OMon. 2/m5.CB.20MonohydrocalciteCaCO3 · H2OTrig. 3 :P315.CB.25IkaiteCaCO3 · 6H2OMon. 2/m :B2/b5.CB.30PirssoniteNa2Ca(CO3)2 · 2H2OOrth.mm2 :Fdd25.CB.35GaylussiteNa2Ca(CO3)2 · 5H2OMon. 2/m :B2/b5.CB.45BaylissiteK2Mg(CO3)2 · 4H2OMon. 2/m :P21/m5.CB.50TuliokiteNa6BaTh(CO3)6 · 6H2OTrig.3 :R3

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    • References for ChalconatroniteⓘRapid shipwreckMacLeod (1991)Pryce et al. (1974)+4 other references
    Austria
     
    Pichler (2009)
    Canada
     
    A. McDonald & RRUFF data
    Chile
     
    Maurizio Dini+1 other reference
    Czech Republic
     
    Jakub PlasilPlášil et al. (2013)
    Egypt (TL)
     
    Germany
     
    Weiß (1990)Weiß (1990)Schnorrer-Köhler (1981)+1 other referenceT Thieme collectionWeiß (1990)King et al. (1987)58 (in German)+1 other referenceSchnorrer-Köhler et al. (1991)Knoll (2004)Hofmann (1992)+1 other reference
    Namibia
     
    Desor (10/2023)
    Poland
     
    Łukasz Kruszewski PXRD & EPMA data (2018)
    Spain
     
    Desor (2018)
    Switzerland
     
    Stalder et al. (1998)
    USA
     
    Haynes (1992)+1 other referenceHeinrich et al. (2004)Rosemeyer (2007)R&M 74:3 p160-176Kampf et al. (2018)Dietrich (1990)
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