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Francisite

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Iron Monarch open cut, Iron Knob, Middleback Range, Eyre Peninsula, South Australia, Australia

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Formula:
Cu
 
3
Bi(SeO
 
3
)
 
2
O
 
2
Cl
System:OrthorhombicColour:Bright green
Hardness:3 - 4
Name:Named in recognition of Glyn Francis's (b. 1939) contribution to the understanding and preservation of the minerals of the Iron Monarch ore body. Glyn was Quality Control Officer at Iron Monarch and produced a book on the deposit in 2010.
This page provides mineralogical data about Francisite.

Classification of Francisite

IMA status:Approved
Strunz 8th edition ID:4/K.10-50
Nickel-Strunz 10th (pending) edition ID:4.JG.25

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:34.6.6.1

34 : SELENITES, TELLURITES AND SULFITES
6 : Anhydrous Selenites, Tellurites and Sulfites containing Hydroxyl or Halogen
Hey's CIM Ref.:28.1.3

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

Type Locality:Iron Monarch open cut, Iron Knob, Middleback Range, Eyre Peninsula, South Australia, Australia
Year of Discovery:1990

Physical Properties of Francisite

Colour:Bright green
Hardness (Mohs):3 - 4

Crystallography of Francisite

Crystal System:Orthorhombic
Cell Parameters:a = 6.35Å, b = 9.63Å, c = 7.22Å
Ratio:a:b:c = 0.659 : 1 : 0.75
Unit Cell Volume:V 441.51 ų (Calculated from Unit Cell)

Chemical Properties of Francisite

Formula:
Cu
 
3
Bi(SeO
 
3
)
 
2
O
 
2
Cl
Essential elements:Bi, Cl, Cu, O, Se
All elements listed in formula:Bi, Cl, Cu, O, Se

Relationship of Francisite 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.15Sofiite
Zn
 
2
(SeO
 
3
)Cl
 
2
4.JG.20Ilinskite
(Na,K)Cu
 
5
(SeO
 
3
)
 
2
O
 
2
Cl
 
3
4.JG.30Derriksite
Cu
 
4
(UO
 
2
)(SeO
 
3
)
 
2
(OH)
 
6
 · H
 
2
O
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
28.1.4Sofiite
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
28.1.7Derriksite
Cu
 
4
(UO
 
2
)(SeO
 
3
)
 
2
(OH)
 
6
 · H
 
2
O
28.1.8Marthozite
Cu(UO
 
2
)
 
3
(SeO
 
3
)
 
2
(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 Francisite

Synonyms:
IMA1989-028
Other Languages:
German:Francisit
Russian:Франсисит
Spanish:Francisita

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 Francisite

Reference List:

- +
American Mineralogist: 75: 1421-1425.

Internet Links for Francisite

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

    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.
    Australia
     
    • South Australia
      • Eyre Peninsula
        • Middleback Range
          • Iron Knob
    		Amer.Min.(1990) 75, 1421-1425; Pring, A., Francis, G. & Birch, W. D. (1992): Nissonite, namibite, and other additions to the mineral suite from Iron Monarch, South Australia. Australian Mineral. 6, 31-39.
    Italy
     
    • Sardinia
      • Cagliari Province
        • Villaputzu
    		Campostrini, I. & Gramaccioli, C. M. (2001): Selenium-rich secondary minerals from the Baccu Locci mine (Sardinia, Italy). Neues Jahrbuch fuer Mineralogie, Abhandlungen 177, 37-59.
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