Francisite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Francisite
Glyn Francis
Formula:
Cu3Bi(SeO3)2O2Cl
Colour:
Bright green
Lustre:
Adamantine
Hardness:
3 - 4
Specific Gravity:
5.42 (Calculated)
Crystal System:
Orthorhombic
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.
Unique Identifiers
Mindat ID:
1591
Long-form identifier:
mindat:1:1:1591:8
Similar Names
| Françoisite | ||
| Françoisite-(Ce) | A valid IMA mineral species | (Ce,Nd,Ca)(UO2)3(PO4)2O(OH) · 6H2O |
| Françoisite-(Nd) | A valid IMA mineral species | (Nd,Ce,Sm)(UO2)3(PO4)2O(OH) · 6H2O |
| Vrančiceite | A valid IMA mineral species | Cu10Hg3S8 |
IMA Classification of Francisite
Approved
IMA Formula:
Cu2+3Bi3+(Se4+O3)2O2Cl
Approval year:
1989
First published:
1990
Classification of Francisite
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
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
34.6.6.1
34 : SELENITES, TELLURITES AND SULFITES
6 : Anhydrous Selenites, Tellurites and Sulfites containing Hydroxyl or Halogen
34 : SELENITES, TELLURITES AND SULFITES
6 : Anhydrous Selenites, Tellurites and Sulfites containing Hydroxyl or Halogen
28.1.3
28 : Selenites, Selenates, Tellurites, and Tellurates
1 : Selenites
28 : Selenites, Selenates, Tellurites, and Tellurates
1 : Selenites
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Fcs | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Francisite
Adamantine
Colour:
Bright green
Streak:
Pale apple green
Hardness:
3 - 4 on Mohs scale
Comment:
estimated
Cleavage:
None Observed
Fracture:
Conchoidal
Density:
5.42 g/cm3 (Calculated)
Chemistry of Francisite
Mindat Formula:
Cu3Bi(SeO3)2O2Cl
Element Weights:
Crystallography of Francisite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Pmmn
Setting:
Pmmn
Cell Parameters:
a = 6.356(1) Å, b = 9.633(2) Å, c = 7.224(2) Å
Ratio:
a:b:c = 0.66 : 1 : 0.75
Unit Cell V:
442.31 ų (Calculated from Unit Cell)
Z:
2
Twinning:
Contact twinning on {100}
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0001339 | Francisite | Pring A, Gatehouse B M, Birch W D (1990) Francisite, Cu3Bi(SeO3)2O2Cl, a new mineral from Iron Monarch, South Australia: Description and crystal structure American Mineralogist 75 1421-1425 |  | 1990 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.31 Å | (60) |
| 3.39 Å | (100) |
| 2.866 Å | (80) |
| 2.652 Å | (70) |
| 2.491 Å | (60) |
| 1.695 Å | (35) |
| 1.588 Å | (60) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 21 : Chemically precipitated carbonate, phosphate, iron formations | |
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47d : [Arsenates, antimonates, selenates, bismuthinates] | |
| 47g : [Halogen-bearing surface weathering minerals] |
Type Occurrence of Francisite
General Appearance of Type Material:
Bladed crystals
Place of Conservation of Type Material:
South Australian Museum, Adelaide, and the Museum of Victoria, Melbourne.
Geological Setting of Type Material:
Barite lens in hematite ore. Hydrothermal alteration
of the selenide and sulfide minerals
of the selenide and sulfide minerals
Associated Minerals at Type Locality:
Synonyms of Francisite
Other Language Names for Francisite
Common Associates
Associations Based on Photo Data:
| 1 photo of Francisite associated with Chalcomenite | CuSeO3 · 2H2O |
| 1 photo of Francisite associated with Carbonatecyanotrichite | Cu4Al2(CO3,SO4)(OH)12 · 2H2O |
Related Minerals - Strunz-mindat Grouping
| 4.JG. | Prewittite | KPb1.5ZnCu6(SeO3)2O2Cl10 |
| 4.JG. | Masaitisite | KCu5O2(SeO3)2Cl3 |
| 4.JG. | Wangkuirenite | Pb3Cl2(SeO3)2 |
| 4.JG. | Guangyuanite | Pb3Cl3(Se4+O3)(OH) |
| 4.JG.05 | Georgbokiite | Cu5(SeO3)2O2Cl2 |
| 4.JG.05 | Parageorgbokiite | Cu5(SeO3)2O2Cl2 |
| 4.JG.10 | Chloromenite | Cu9(SeO3)4O2Cl6 |
| 4.JG.15 | Sofiite | Zn2(SeO3)Cl2 |
| 4.JG.20 | Ilinskite | (Na,K)Cu5(SeO3)2O2Cl3 |
| 4.JG.30 | Derriksite | Cu4(UO2)(SeO3)2(OH)6 |
| 4.JG.35 | Burnsite | KCdCu2+7(SeO3)2O2Cl9 |
| 4.JG.40 | Allochalcoselite | Cu+PbCu2+5(SeO3)2Cl5O2 |
| 4.JG.45 | Nicksobolevite | Cu7(SeO3)2O2Cl6 |
| 4.JG.50 | Plumboselite | Pb3O2(SeO3) |
| 4.JG.55 | Sarrabusite | Pb5CuCl4(SeO3)4 |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Francisite
mindat.org URL:
https://www.mindat.org/min-1591.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Francisite
Localities for Francisite
Showing 2 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Australia (TL) | |
| Pring et al. (1990) +1 other reference |
Italy | |
| www.mindat.org (n.d.) +2 other references |
Quick NavTopAbout FrancisiteUnique IdentifiersSimilar NamesIMA Classification Classification Mineral SymbolsPhysical Properties Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Iron Monarch Main Pit, Iron Knob, Pastoral Unincorporated Area, South Australia, Australia