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Rouaite

Formula:
Cu
 
2
[(OH)
 
3
|NO
 
3
]
System:MonoclinicColour:Dark emerald-green
Lustre:Vitreous
Name:After the type locality - old copper mines of Roua, Alpes-Maritimes, France.
Dimorph of:Gerhardtite


An uncommon secondary copper nitrate.

Easy to confused with its dimorph gerhardtite (both have very similar X-ray powder diffraction patterns).

Classification of Rouaite

IMA status:Approved
Strunz 8th edition ID:5/A.03-15
Nickel-Strunz 10th (pending) edition ID:5.NB.05

5 : CARBONATES (NITRATES)
N : NITRATES
B : With OH
Dana 7th edition ID:19.1.2.1
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Type Occurrence of Rouaite

Type Locality:Roua Mines (Clue de Roua), Daluis, Guillaumes, Alpes-Maritimes, Provence-Alpes-Côte d'Azur, France

Physical Properties of Rouaite

Lustre:Vitreous
Colour:Dark emerald-green
Streak:clear green

Crystallography of Rouaite

Crystal System:Monoclinic
Class (H-M):2 - Sphenoidal
Space Group:P21 {P1 1 21} {P21} {P1 21 1}
Cell Parameters:a = 5.596(2) Å, b = 6.079(2) Å, c = 6.925(3) Å
β = 94.67(2)°
Ratio:a:b:c = 0.921 : 1 : 1.139
Unit Cell Volume:V 234.79 ų (Calculated from Unit Cell)
Z:2
Morphology:Tabular on {001} or equant.
Comment:Commonly twinned on {001}.

Optical Data of Rouaite

Type:Biaxial (+)
RI values: nα = 1.700 nβ = 1.715 nγ = 1.738
2V:Measured: 81° , Calculated: 80°
Maximum Birefringence:δ = 0.038

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:r > v strong

Chemical Properties of Rouaite

Formula:
Cu
 
2
[(OH)
 
3
|NO
 
3
]
Essential elements:Cu, H, N, O
All elements listed in formula:Cu, H, N, O

Relationship of Rouaite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
5.NB.05Gerhardtite
Cu
 
2
[(OH)
 
3
|NO
 
3
]

Other Names for Rouaite

Synonyms:
IMA1999-010
Other Languages:
German:Rouait
Spanish:Rouaita

Other Information

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

References for Rouaite

Reference List: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.

American Mineralogist (2002): 87: 998.

Internet Links for Rouaite

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    Localities for Rouaite

    The 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. ? 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.
    France
     
    • 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.
    USA
     
    • New Jersey
      • Sussex Co.
        • Franklin Mining District
          • Ogdensburg
            • Sterling Hill
    Sarp, et al, Riviéra Scientifique:85:3-12, 2001 (15 Oct 2001),
    Zimbabwe
     
    • Mashonaland West
      • Kadoma District
    Uwe Kolitsch collection (SXRD analysis)
    Mineral and/or Locality
    Google
     
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 13th Nov 2009 16:44:34