Franksousaite
A valid IMA mineral species
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About Franksousaite
Formula:
PbCu(Se6+O4)(OH)2
Colour:
Blue
Lustre:
Vitreous
Hardness:
2 - 2½
Specific Gravity:
5.64 (Calculated)
Crystal System:
Monoclinic
Member of:
Name:
Named in honour of Mr. Francis (Frank) X. Sousa (b. 1951), of Tuscon, Arizona, USA. Frank's interest in minerals began at age 9 and he started collecting minerals, especially Pb-bearing minerals, in his teenage years. He is a strong promoter of mineral collecting and is a dedicated volunteer, including at multiple Arizona museums.
Unique Identifiers
Mindat ID:
55765
Long-form identifier:
mindat:1:1:55765:6
GUID
(UUID V4):
(UUID V4):
466c8b89-f4fc-4f68-9d0c-d4931518337a
IMA Classification of Franksousaite
Approved
First published:
2022
Classification of Franksousaite
7.BC.
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H2O
C : With medium-sized and large cations
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H2O
C : With medium-sized and large cations
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 |
---|---|---|
Fns | 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 Franksousaite
Vitreous
Transparency:
Transparent
Colour:
Blue
Streak:
Very pale blue
Hardness:
2 - 2½ on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Cleavage could not be determined due to the small crystal size. By its structural analogue to linarite, it should have perfect cleavage on {100}.
Cleavage could not be determined due to the small crystal size. By its structural analogue to linarite, it should have perfect cleavage on {100}.
Density:
5.64 g/cm3 (Calculated)
Chemistry of Franksousaite
Mindat Formula:
PbCu(Se6+O4)(OH)2
Crystallography of Franksousaite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Setting:
P21/m
Cell Parameters:
a = 9.8208(3) Å, b = 5.7340(2) Å, c = 4.7498(1) Å
β = 102.683(2)°
β = 102.683(2)°
Ratio:
a:b:c = 1.713 : 1 : 0.828
Unit Cell V:
260.95 ų (Calculated from Unit Cell)
Z:
2
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
9.548 Å | (22) |
4.917 Å | (24) |
4.578 Å | (35) |
3.602 Å | (60) |
3.193 Å | (100) |
3.150 Å | (50) |
2.621 Å | (21) |
1.828 Å | (21) |
Type Occurrence of Franksousaite
General Appearance of Type Material:
Prismatic crystals included in colourless anglesite. Individual crystals of franksousaite are found up to 0.05 × 0.02 × 0.02 mm.
Place of Conservation of Type Material:
Collections of (1) the University of Arizona Gem and Mineral Museum, 115 N Church Ave., Tucson, AZ 85701, USA, catalogue number 22713 (holotype), and (2) the RRUFF Project, deposition number R210012 (cotype).
Geological Setting of Type Material:
Telethermal deposit consisting of a single selenide vein hosted in sandstones and shales.
Associated Minerals at Type Locality:
Synonyms of Franksousaite
Relationship of Franksousaite to other Species
Member of:
Other Members of this group:
Chenite | Pb4Cu(SO4)2(OH)6 | Tric. 1 : P1 |
Linarite | PbCu(SO4)(OH)2 | Mon. 2/m : P21/m |
Munakataite | Pb2Cu2(Se4+O3)(SO4)(OH)4 | Mon. 2/m : P21/m |
Schmiederite | Pb2Cu2(Se6+O4)(Se4+O3)(OH)4 | Mon. 2/m : P21/m |
Related Minerals - Strunz-mindat Grouping
7.BC. | Adranosite-(Fe) | (NH4)4NaFe3+2(SO4)4Cl(OH)2 |
7.BC. | Adranosite | (NH4)4NaAl2(SO4)4Cl(OH)2 |
7.BC. | D'Ansite-(Mn) | Na21Mn2+(SO4)10Cl3 |
7.BC. | Agaite | Pb3CuTeO5(OH)2(CO3) |
7.BC. | D'Ansite-(Fe) | Na21Fe2+(SO4)10Cl3 |
7.BC. | Acmonidesite | (NH4,K,Pb)8NaFe2+4(SO4)5Cl8 |
7.BC. | Backite | Pb2AlTeO6Cl |
7.BC. | Hagstromite | Pb8Cu2+(Te6+O6)2(CO3)Cl4 |
7.BC. | Wildcatite | CaFe3+Te6+O5(OH) |
7.BC. | Zincochenite | Pb4Zn(OH)6(SO4)2 |
7.BC. | Viskontite | Pb5Cu2(SO4)3(SeO3)(OH)6 |
7.BC.05 | D'Ansite | Na21Mg(SO4)10Cl3 |
7.BC.07 | Apatelite | Fe3(SO4)2(OH)5 · 0.5H2O |
7.BC.07 | Unnamed (Ba-Fe Vanadate) | Ba, Fe, V, O, H |
7.BC.10 | Alunite | KAl3(SO4)2(OH)6 |
7.BC.10 | Ammonioalunite | (NH4)Al3(SO4)2(OH)6 |
7.BC.10 | Ammoniojarosite | (NH4)Fe3+3(SO4)2(OH)6 |
7.BC.10 | Argentojarosite | AgFe3+3(SO4)2(OH)6 |
7.BC.10 | Beaverite-(Cu) | Pb(Fe3+2Cu)(SO4)2(OH)6 |
7.BC.10 | Dorallcharite | TlFe3+3(SO4)2(OH)6 |
7.BC.10 | Huangite | Ca0.5Al3(SO4)2(OH)6 |
7.BC.10 | Hydroniumjarosite | (H3O)Fe3+3(SO4)2(OH)6 |
7.BC.10 | Jarosite | KFe3+3(SO4)2(OH)6 |
7.BC.10 | Natroalunite-2c | (Na,Ca0.5,K)Al3(SO4)2(OH)6 |
7.BC.10 | Natroalunite | NaAl3(SO4)2(OH)6 |
7.BC.10 | Natrojarosite | NaFe3(SO4)2(OH)6 |
7.BC.10 | Osarizawaite | Pb(Al2Cu2+)(SO4)2(OH)6 |
7.BC.10 | Plumbojarosite | Pb0.5Fe3+3(SO4)2(OH)6 |
7.BC.10 | Schlossmacherite | (H3O)Al3(SO4)2(OH)6 |
7.BC.10 | Walthierite | Ba0.5Al3(SO4)2(OH)6 |
7.BC.10 | Beaverite-(Zn) | Pb(Fe3+2Zn)(SO4)2(OH)6 |
7.BC.15 | Ye'elimite | Ca4Al6(SO4)O12 |
7.BC.20 | Atlasovite | K(BiO)Cu6Fe3+(SO4)5O3Cl |
7.BC.20 | Nabokoite | KCu7(SO4)5(Te4+O3)OCl |
7.BC.20 | Puninite | Na2Cu3O(SO4)3 |
7.BC.25 | Chlorothionite | K2Cu(SO4)Cl2 |
7.BC.30 | Euchlorine | KNaCu3(SO4)3O |
7.BC.30 | Fedotovite | K2Cu3(SO4)3O |
7.BC.35 | Kamchatkite | KCu3(SO4)2OCl |
7.BC.40 | Piypite | K4Cu4O2(SO4)4 · (Na,Cu)Cl |
7.BC.45 | Klyuchevskite | K3Cu3(Fe3+,Al)(SO4)4O2 |
7.BC.45 | Alumoklyuchevskite | K3Cu3(Al,Fe3+)(SO4)4O2 |
7.BC.45 | Belousovite | KZn(SO4)Cl |
7.BC.47 | Müllerite | Pb2Fe3+(Te6+O6)Cl |
7.BC.50 | Caledonite | Pb5Cu2(SO4)3(CO3)(OH)6 |
7.BC.50 | Elasmochloite | Na3Cu6BiO4(SO4)5 |
7.BC.52 | Eleomelanite | (K2Pb)Cu4O2(SO4)4 |
7.BC.55 | Wherryite | Pb7Cu2(SO4)4(SiO4)2(OH)2 |
7.BC.55 | Falgarite | K4(VO)3(SO4)5 |
7.BC.57 | Krasheninnikovite | KNa2CaMg(SO4)3F |
7.BC.60 | Mammothite | Pb6Cu4AlSb5+O2(OH)16Cl4(SO4)2 |
7.BC.60 | Wulffite | K3NaCu4O2(SO4)4 |
7.BC.60 | Parawulffite | K5Na3Cu8O4(SO4)8 |
7.BC.62 | Shuvalovite | K2(Ca2Na)(SO4)3F |
7.BC.65 | Linarite | PbCu(SO4)(OH)2 |
7.BC.65 | Schmiederite | Pb2Cu2(Se6+O4)(Se4+O3)(OH)4 |
7.BC.65 | Munakataite | Pb2Cu2(Se4+O3)(SO4)(OH)4 |
7.BC.65 | Therasiaite | (NH4)3KNa2Fe2+Fe3+(SO4)3Cl5 |
7.BC.65 | Saccoite | Ca2Mn3+2F(OH)8 · 0.5(SO4) |
7.BC.70 | Chenite | Pb4Cu(SO4)2(OH)6 |
7.BC.75 | Krivovichevite | Pb3Al(OH)6(SO4)(OH) |
7.BC.80 | Anhydrokainite | KMg(SO4)Cl |
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 Franksousaite
mindat.org URL:
https://www.mindat.org/min-55765.html
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Please feel free to link to this page.
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References for Franksousaite
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2022) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 65. European Journal of Mineralogy, 34 (1) 143-148 doi:10.5194/ejm-34-143-2022
Localities for Franksousaite
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).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Bolivia (TL) | |
| Miyawaki et al. (2022) +1 other reference |
El Dragón mine, Porco Municipality, Antonio Quijarro Province, Potosí, Bolivia