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Cuprorivaite

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Summit Rock, Klamath Co., Oregon, USA
© Brent Thorne

Show Cuprorivaite Photos (7)
Formula:
CaCu[Si
 
4
O
 
10
]
System:TetragonalHardness: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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Physical Properties of Cuprorivaite

Hardness (Mohs):5

Crystallography of Cuprorivaite

Crystal System:Tetragonal
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)

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

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
[(F,OH)|Si
 
8
O
 
20
] · 8H
 
2
O
9.EA.15Apophyllite-(KOH)
KCa
 
4
[(OH,F)|Si
 
8
O
 
20
] · 8H
 
2
O
9.EA.15Apophyllite-(NaF)
NaCa
 
4
[F|Si
 
8
O
 
20
] · 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
 * 4 H
 
2
O
9.EA.70Ajoite
(K,Na)Cu
 
7
[(OH)
 
6
|AlSi
 
9
O
 
24
] · 3H
 
2
O
9.EA.75Zeravshanite
Cs
 
4
Na
 
2
Zr
 
3
[Si
 
18
O
 
45
](H
 
2
O)
 
2
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
Cu
 
6
(Si
 
6
O
 
18
)·6H
 
2
O
14.2.2Shattuckite
Cu
 
5
[(OH)
 
2
|(SiO
 
3
)
 
4
]
14.2.3Plancheite
Cu
 
8
[(OH)
 
4
|Si
 
8
O
 
22
] · H
 
2
O
14.2.4Gilalite
Cu
 
5
Si
 
6
O
 
17
·7H
 
2
O
14.2.5Chrysocolla
(Cu,Al)
 
2
H
 
2
Si
 
2
O
 
5
(OH)
 
4
·nH
 
2
O
14.2.6Litidionite
CuNaKSi
 
4
O
 
10
14.2.7Reinhardbraunsite
Ca
 
5
[(OH,F)
 
2
|(SiO
 
4
)
 
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

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Cuprorivaite in the Natural History Museum (London) online catalogue
  • Cuprorivaite details from Handbook of Mineralogy (PDF)
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    Localities for Cuprorivaite

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