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Cuprorivaite

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Big Photo

Summit Rock, Klamath Co., Oregon, USA
© R.D.Green

Show Cuprorivaite Photos (10)



Formula:
CaCu[Si
 
4
O
 
10
]
System:TetragonalColour:Blue
Hardness:5
This page provides mineralogical data about Cuprorivaite.

Classification of Cuprorivaite

IMA status:Approved
Strunz 8th edition ID:8/H.02-10
Nickel-Strunz 10th (pending) edition ID:9.EA.05

9 : SILICATES (Germanates)
E : Phyllosilicates
A : Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings
Dana 8th edition ID:71.2.3.1

71 : PHYLLOSILICATES Sheets of Six-Membered Rings
2 : Sheets of 6-membered rings with 2:1 layers
Hey's CIM Ref.:14.2.8

14 : Silicates not Containing Aluminum
2 : Silicates of Cu
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Type Occurrence of Cuprorivaite

Type Locality:Mt Vesuvius, Somma-Vesuvius Complex, Naples Province, Campania, Italy
Year of Discovery:1938

Physical Properties of Cuprorivaite

Lustre:Vitreous
Colour:Blue
Hardness (Mohs):5
Tenacity:Brittle
Cleavage:Perfect
on {001}
Density (measured):3.08(60) g/cm3
Density (calculated):3.09 g/cm3

Crystallography of Cuprorivaite

Crystal System:Tetragonal
Class (H-M):4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:P4/ncc {P4/n 21/c 2/c}
Space Group Setting:P4/ncc
Cell Parameters:a = 7.3Å, c = 15.12Å
Ratio:a:c = 1 : 2.071
Unit Cell Volume:V 805.74 ų (Calculated from Unit Cell)
Z:4
Morphology:Tabular {001}

Optical Data of Cuprorivaite

Type:Uniaxial (-)
RI values: nω = 1.633 nε = 1.590
Maximum Birefringence:δ = 0.043

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Pleochroism:Visible
Comments:Blue - O
Pale rose - nearly colorless - E

Chemical Properties of Cuprorivaite

Formula:
CaCu[Si
 
4
O
 
10
]
Essential elements:Ca, Cu, O, Si
All elements listed in formula:Ca, Cu, O, Si
Common Impurities:Al,Fe,Na,K,S

Relationship of Cuprorivaite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.EA.05Gillespite
BaFe
2+
 
[Si
 
4
O
 
10
]
9.EA.05Effenbergerite
BaCu[Si
 
4
O
 
10
]
9.EA.05Wesselsite
SrCu[Si
 
4
O
 
10
]
9.EA.10Ekanite
(Ca,Fe
2+
 
,Pb)
 
2
(Th,U)[Si
 
8
O
 
20
]
9.EA.15Apophyllite-(KF)
KCa
 
4
(Si
 
8
O
 
20
)(F,OH) · 8H
 
2
O
9.EA.15Apophyllite-(KOH)
KCa
 
4
(Si
 
8
O
 
20
)(OH,F) · 8H
 
2
O
9.EA.15Apophyllite-(NaF)
NaCa
 
4
(Si
 
8
O
 
20
)F · 8H
 
2
O
9.EA.20Magadiite
NaSi
 
7
O
 
13
(OH)
 
3
 · 3H
 
2
O
9.EA.25Dalyite
K
 
2
ZrSi
 
6
O
 
15
9.EA.25Davanite
K
 
2
TiSi
 
6
O
 
15
9.EA.30Sazhinite-(Ce)
Na
 
3
Ce[Si
 
6
O
 
15
] · 6H
 
2
O
9.EA.30Sazhinite-(La)
Na
 
3
La[Si
 
6
O
 
15
] · 2H
 
2
O
9.EA.35Armstrongite
CaZr[Si
 
6
O
 
15
] · 3H
 
2
O
9.EA.40Okenite
CaSi
 
2
O
 
5
 · 2H
 
2
O
9.EA.45Nekoite
Ca
 
3
Si
 
6
O
 
15
·7H
 
2
O
9.EA.50Cavansite
Ca(VO)Si
 
4
O
 
10
 · 4H
 
2
O
9.EA.55Pentagonite
Ca(VO)Si
 
4
O
 
10
 · 4H
 
2
O
9.EA.60Penkvilksite
Na
 
4
Ti
 
2
Si
 
8
O
 
22
 · 4H
 
2
O
9.EA.60Tumchaite
Na
 
2
Zr(Si
 
4
O
 
11
) · 2H
 
2
O
9.EA.65Nabesite
Na
 
2
BeSi
 
4
O
 
10
 · 4H
 
2
O
9.EA.70Ajoite
(K,Na)Cu
 
7
AlSi
 
9
O
 
24
(OH)
 
6
 · 3H
 
2
O
9.EA.75Zeravshanite
Na
 
2
Cs
 
4
Zr
 
3
[Si
 
18
O
 
45
]*2H
 
2
O
9.EA.80Bussyite-(Ce)
(Ce,REE)
 
3
(Na,H
 
2
O)
 
6
MnSi
 
9
Be
 
5
(O,OH)
 
30
F
 
4
9.EA.85Plumbophyllite
Pb
 
2
Si
 
4
O
 
10
 · H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
14.2.1Dioptase
CuSiO
 
3
 · H
 
2
O
14.2.2Shattuckite
Cu
 
5
(Si
 
2
O
 
6
)
 
2
(OH)
 
2
14.2.3Plancheite
Cu
 
8
(Si
 
8
O
 
22
)(OH)
 
4
 · H
 
2
O
14.2.4Gilalite
Cu
 
5
Si
 
6
O
 
17
 · 7H
 
2
O
14.2.5Chrysocolla
Cu
 
2-x
Al
 
x
(H
 
2-x
Si
 
2
O
 
5
)(OH)
 
4
 · nH
 
2
O (x < 1)
14.2.6Litidionite
CuNaKSi
 
4
O
 
10
14.2.7Reinhardbraunsite
Ca
 
5
(SiO
 
4
)
 
2
(OH,F)
 
2
14.2.9Kinoite
Ca
 
2
Cu
 
2
(H
 
2
O)
 
2
[Si
 
3
O
 
10
]
14.2.10Stringhamite
CaCu(SiO
 
4
) · H
 
2
O
14.2.11Apachite
Cu
 
9
Si
 
10
O
 
29
 · 11H
 
2
O

Other Names for Cuprorivaite

Synonyms:
Egyptian Blue
Other Languages:
Russian:Купрориваит

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 Cuprorivaite

Reference List:

- +
American Mineralogist: 47: 409-411.

Minguzzi C. – (1938) Cuprorivaite: un nuovo minerale. Periodico di Mineralogia – Roma pp. 333-345.

Zeitschrift für Kristallographie: 210: 530.

Internet Links for Cuprorivaite

Search Engines:
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  • Look for Cuprorivaite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Cuprorivaite details from Handbook of Mineralogy (PDF)
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    • Localities for Cuprorivaite

    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.
    Hide Locality List
    (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.
    Germany
     
    • Rhineland-Palatinate
      • Eifel
        • Andernach
          • Eich
    		Hentschel, G., Die Mineralien der Eifelvulkane, Weise Verlag München, 1983
          • Nickenich
    		Hentschel, G., Die Mineralien der Eifelvulkane, Weise Verlag München, 1983
        • Mayen
          • Ettringen
            • Bellerberg volcano
    		Blass, G., Graf, H.W., Neue Mineralienfunde aus der Vulkaneifel, Mineralien-Welt 12/1, 17-25, 2001
        • Mendig
          • Bell
    		Schüller, W. (2013): Der Rothenberg bei Bell, Eifel. Lapis 38 (1), 18-26, 39.
    Italy
     
    • Campania
      • Naples Province
        • Somma-Vesuvius Complex
    		Russo, M., Punzo, I. (2004): I minerali del Somma-Vesuvio, AMI; American Mineralogist 47:409-411
    USA
     
    • Arizona
      • Pima Co.
        • Ajo District
          • Little Ajo Mts
    		American Mineralogist 47:409-411
    • Oregon
      • Klamath Co.
    		Micro Probe Vol. 10 No. 6
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