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Derriksite

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Musonoi Mine, Kolwezi, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre)
© Stephan Wolfsried

Show Derriksite Photos (15)



Formula:
Cu
 
4
(UO
 
2
)(SeO
 
3
)
 
2
(OH)
 
6
 · H
 
2
O
Name:After Joseph Derriks (1912-1992), geologist and administrator of the Union Minière du Haut Katanga (UMHK).
This page provides mineralogical data about Derriksite.

Classification of Derriksite

IMA status:Approved
Strunz 8th edition ID:4/K.11-10
Nickel-Strunz 10th (pending) edition ID:4.JG.30

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
G : Selenites with additional anions, without H2O
Dana 8th edition ID:34.7.5.1

34 : SELENITES, TELLURITES AND SULFITES
7 : Hydrated Selenites, Tellurites and Sulfites containing Hydroxyl or Halogen
Hey's CIM Ref.:28.1.7

28 : Selenites, Selenates, Tellurites, and Tellurates
1 : Selenites
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Type Occurrence of Derriksite

Type Locality:Musonoi Mine, Kolwezi, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre)

Optical Data of Derriksite

Type:Biaxial (-)
RI values: nα = 1.770 nβ = 1.850 nγ = 1.890
Maximum Birefringence:δ = 0.120

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

Chemical Properties of Derriksite

Formula:
Cu
 
4
(UO
 
2
)(SeO
 
3
)
 
2
(OH)
 
6
 · H
 
2
O
Essential elements:Cu, H, O, Se, U
All elements listed in formula:Cu, H, O, Se, U

Relationship of Derriksite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.JG.Prewittite
KPb
 
1.5
ZnCu
 
6
(SeO
 
3
)
 
2
O
 
2
Cl
 
10
4.JG.05Georgbokiite
Cu
 
5
(SeO
 
3
)
 
2
O
 
2
Cl
 
2
4.JG.05Parageorgbokiite
Cu
 
5
(SeO
 
3
)
 
2
O
 
2
Cl
 
2
4.JG.10Chloromenite
Cu
 
9
(SeO
 
3
)
 
4
O
 
2
Cl
 
6
4.JG.15Sophiite
Zn
 
2
(SeO
 
3
)Cl
 
2
4.JG.20Ilinskite
(Na,K)Cu
 
5
(SeO
 
3
)
 
2
O
 
2
Cl
 
3
4.JG.25Francisite
Cu
 
3
Bi(SeO
 
3
)
 
2
O
 
2
Cl
4.JG.35Burnsite
KCdCu
2+
7
(SeO
 
3
)
 
2
O
 
2
Cl
 
9
4.JG.40Allochalcoselite
Cu
+
 
PbCu
2+
5
(SeO
 
3
)
 
2
Cl
 
5
O
 
2
Related Minerals - Hey's Index Grouping:

- +
28.1.1Chalcomenite
CuSeO
 
3
 · 2H
 
2
O
28.1.2Clinochalcomenite
CuSeO
 
3
 · 2H
 
2
O
28.1.3Francisite
Cu
 
3
Bi(SeO
 
3
)
 
2
O
 
2
Cl
28.1.4Sophiite
Zn
 
2
(SeO
 
3
)Cl
 
2
28.1.5Molybdomenite
PbSeO
 
3
28.1.6Haynesite
(UO
 
2
)
 
3
(OH)
 
2
(SeO
 
3
)
 
2
 · 5H
 
2
O
28.1.8Marthozite
Cu(UO
 
2
)
 
3
(SeO
 
3
)
 
3
(OH)
 
2
 · 7H
 
2
O
28.1.9Guilleminite
Ba(UO
 
2
)
 
3
(SeO
 
3
)
 
2
(OH)
 
4
 · 3H
 
2
O
28.1.10Demesmaekerite
Pb
 
2
Cu
 
5
(UO
 
2
)
 
2
(SeO
 
3
)
 
6
(OH)
 
6
 · 2H
 
2
O
28.1.11Mandarinoite
Fe
3+
2
(SeO
 
3
)
 
3
 · 4H
 
2
O
28.1.12Cobaltomenite
CoSeO
 
3
 · 2H
 
2
O
28.1.13Ahlfeldite
(Ni,Co)SeO
 
3
 · 2H
 
2
O

Other Names for Derriksite

Synonyms:
IMA1971-033
Other Languages:
German:Derriksit
Russian:Дерриксит
Spanish:Derriksita

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 Derriksite

Reference List:

- +
American Mineralogist: 57: 1912-1913.

Ginderow, D. and Cesbron, F. (1983a) Structure de la derriksite, Cu4(UO2)(SeO3)2(OH)6. Acta Crystallographica: C39: 1605-1607.

Burns, P.C. (2005) U 6+ minerals and inorganic compounds: insights into an expanded structural hierarchy of crystal structures. Canadian Mineralogist: 43: 1839-1894.

Internet Links for Derriksite

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    • Localities for Derriksite

    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.
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    (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.
    Democratic Republic of Congo (Zaïre)
     
    • Katanga (Shaba)
      • Katanga Copper Crescent
        • Kolwezi
    		Bull.Soc.fr.Min.Crist.(1971) 94, 534-537
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