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About RouaiteHide

Dark emerald-green
Crystal System:
Named in 2001 by Halil Sarp, Radovan Černý, and Laure Guenee, after the principle co-type locality - old copper mines of Roua, Alpes-Maritimes, France.
Dimorph of:
An uncommon secondary copper nitrate.

Easy to confuse with its dimorph gerhardtite (both have very similar X-ray powder diffraction patterns). At ambient temperatures, rouaite is metastable by comparison to gerhardtite, but the transformation from rouaite to gerhardtite is strongly inhibited (Oswald, 1961).

Classification of RouaiteHide


B : With OH
Dana 7th ed.:

Physical Properties of RouaiteHide

Dark emerald-green
clear green

Optical Data of RouaiteHide

Biaxial (+)
RI values:
nα = 1.700 nβ = 1.715 nγ = 1.738
Measured: 81° , Calculated: 80°
Max Birefringence:
δ = 0.038
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
r > v strong

Chemical Properties of RouaiteHide


Crystallography of RouaiteHide

Crystal System:
Class (H-M):
2 - Sphenoidal
Space Group:
Cell Parameters:
a = 5.596(2) Å, b = 6.079(2) Å, c = 6.925(3) Å
β = 94.67(2)°
a:b:c = 0.921 : 1 : 1.139
Unit Cell V:
234.79 ų (Calculated from Unit Cell)
Tabular on {001} or equant.
Commonly twinned on {001}.

Type Occurrence of RouaiteHide

Synonyms of RouaiteHide

Other Language Names for RouaiteHide

Simplified Chinese:单斜铜硝石

Common AssociatesHide

Associated Minerals Based on Photo Data:
3 photos of Rouaite associated with CupriteCu2O
1 photo of Rouaite associated with GerhardtiteCu2(NO3)(OH)3
1 photo of Rouaite associated with ConnelliteCu19(SO4)(OH)32Cl4 · 3H2O

Related Minerals - Nickel-Strunz GroupingHide

5.NB.05GerhardtiteCu2(NO3)(OH)3Orth. 2 2 2 : P21 21 21

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.

References for RouaiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Oswald, H.R. (1961): Über natürlichen und künstlichen Gerhardtit. Zeits. Krist., 116, 210-219. (in German with English abs.)
Effenberger, H. (1983): Verfeinerung der Struktur des monoklinen Dikupfer(II)-trihydroxi-nitrates Cu2(NO3)(OH3). Z. Kristallogr. 165, 127-135 (in German).
Guillou, N., Louër, M. and Louër, D. (1994): An X-ray and neutron powder diffraction study of a new polymorphic phase of copper hydroxide nitrate. J. Solid State Chem. 109, 307-314.
Sarp, H., Černý, R. & Guenee, L. (2001): Rouaite, Cu2(NO3)(OH)3, un nouveau minéral: sa description et sa structure cristalline (Alpes-Maritimes, France). Riv. Scientifique 85, 3-12 (in French).
American Mineralogist (2002): 87: 998.
C. H. Yoder, E. Bushong, X. Liu, V. Weidner, P. McWilliams, K. Martin, J. Lorgunpai, J. Haller and R. W. Schaeffer (2010): The synthesis and solubility of the copper hydroxyl nitrates, gerhardtite, rouaite and likasite. Mineral. Mag. 74, 433-440.

Internet Links for RouaiteHide

Localities for RouaiteHide

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.
  • Carinthia
    • Sankt Veit an der Glan District
      • Hüttenberg
        • St Martin am Silberberg
Kolitsch, U. (2012): 1717) Rouait aus den Schlackenhalden von St. Martin am Silberberg, Saualpe, Kärnten. Pp. 126-127 in Niedermayr, G. et al. (2012): Neue Mineralfunde aus Österreich LXI. Carinthia II, 202./122., 123-180.
  • Styria
    • Liezen District
      • Rottenmann
        • Bärndorf
          • Prenterwinkelgraben (Bärndorfer Graben)
Kolitsch, U. (2018): 2098) Antlerit, Brochantit, Chalkanthit, Connellit, Cuprit, Gips, Kupfer, Malachit und Rouait aus einer Schlackenhalde bei Bärndorf, Rottenmann, Paltental, Steiermark. Pp. 241-242 in Walter, F. et al. (2018): Neue Mineralfunde aus Österreich LXVII. Carinthia II, 208./128., 185-254.
  • Tyrol
    • Kufstein District
      • Brixlegg
Kolitsch, U. (2013): 1799) Anglesit, Brochantit, Calcit, Callaghanit, Connellit, Cuprit, Diopsid, Elyit, Forsterit, Kupfer, Lithargit, Magnesiochromit, Malachit, Monohydrocalcit, Phoenicochroit, Rouait und Willemit in Schlacken der Montanwerke Brixlegg, Tirol. Pp. 111-114 in Niedermayr, G. et al. (2013): Neue Mineralfunde aus Österreich LXII. Carinthia II, 203./123., 91-146.
Czech Republic
  • Karlovy Vary Region
    • Karlovy Vary District
RRUFF Project. Single crystal X-Ray Diffraction.
Rruff project single crystal XRD.
DR Congo
  • Haut-Katanga
    • Kambove District
      • Luambo
Oswald, H.R. (1961): Über natürlichen und künstlichen Gerhardtit. Zeitschrift für Kristallographie, 116, 210-219.
  • Lualaba
    • Kolwezi mining district
      • Tenke-Fungurume area
Joy Desor (Raman analysis); personal communication from Jasun McAvoy and Carsten Slotta.
France (TL)
  • Provence-Alpes-Côte d'Azur
    • Alpes-Maritimes
      • Guillaumes
        • Daluis
Sarp, H., & Cerný, R. & Guenee, L. (2001): Rouaite, Cu2(NO3)(OH)3, un nouveau minéral: sa description et sa structure cristalline (Alpes-Maritimes, France). Riv. Scientifique 85, 3-12.
  • Baden-Württemberg
    • Freiburg
      • Ortenaukreis
        • Oberwolfach
U. Kolitsch, J. Gröbner, F. Brandstätter and R. Bayerl (2010): Neufunde aus der Grube Clara im mittleren Schwarzwald (IV): Calcioandyrobertsit, Cotunnit, Gerhardtit, Khaidarkanit, Lukrahnit, Mckinstryit, Moolooit, Rhabdophan-(La), Rouait und Uricit. Lapis 35 (9), 22-27; 62 (in German).
  • Bragança
    • Mogadouro
      • Castelo Branco
Pedro Alves analytical data
  • Andalusia
    • Almería
      • Huércal-Overa
        • Cuesta Alta
          • Cerro Minado Mines
Joy Desor ID by Raman spectroscopy, 2018.
  • New Jersey
    • Sussex County
      • Franklin Mining District
        • Ogdensburg
          • Sterling Hill
Sarp, et al, Riviéra Scientifique:85:3-12, 2001 (15 Oct 2001),
  • Mashonaland West
    • Kadoma District
Uwe Kolitsch collection (SXRD analysis)
Mineral and/or Locality  
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