Galeaclolusite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Galeaclolusite
Valérie Galéa-Clolus
Formula:
Al6(AsO4)3(OH)9(H2O)4 · 8H2O
Specific Gravity:
2.27 (Calculated)
Crystal System:
Orthorhombic
Name:
Named in honor of Valérie Galéa-Clolus (b. 1964), for her significant contributions to the mineralogy of the Cap-Garonne Mine. She was President of the Association des Amis de la Mine de Cap Garonne (Friends of Cap Garonne) for many years and co-author of a book on the mine.
Unique Identifiers
Mindat ID:
55231
Long-form identifier:
mindat:1:1:55231:4
IMA Classification of Galeaclolusite
Approved
IMA Formula:
Al6(As5+O4)3(OH)9(H2O)4·8H2O
Approval year:
2020
First published:
2021
Type description reference:
Grey, Ian E., Favreau, George, Mills, Stuart J., Mumme, W. Gus, Bougerol, Catherine, Brand, Helen E.A., Kampf, Anthony R., MacRae, Colin M., Shanks, Finlay (2021) Galeaclolusite, [Al6(AsO4)3(OH)9(H2O)4]⋅8H2O, a new bulachite-related mineral from Cap Garonne, France. Mineralogical Magazine, 85 (2) 142-148 doi:10.1180/mgm.2020.98
Classification of Galeaclolusite
8.DD.
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
D : With only medium-sized cations, (OH, etc.):RO4= 2:1
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
D : With only medium-sized cations, (OH, etc.):RO4= 2:1
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 |
|---|---|---|
| Gcl | 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 Galeaclolusite
Density:
2.27 g/cm3 (Calculated)
Optical Data of Galeaclolusite
Type:
Biaxial
RI values:
nα = 1.550(5) nγ = 1.570(5)
Max. Birefringence:
δ = 0.020
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Low (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Comments:
β not determined
Z = c
Z = c
Chemistry of Galeaclolusite
Mindat Formula:
Al6(AsO4)3(OH)9(H2O)4 · 8H2O
Element Weights:
Elements listed:
Crystallography of Galeaclolusite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Pnma
Setting:
Pnma
Cell Parameters:
a = 19.855(4) Å, b = 17.693(1) Å, c = 7.7799(5) Å
Ratio:
a:b:c = 1.122 : 1 : 0.44
Unit Cell V:
2733 ų
Z:
4
Morphology:
Elongated along [001] and flattened on (100).
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 9.973 Å | (100) |
| 8.851 Å | (60) |
| 7.118 Å | (36) |
| 6.696 Å | (56) |
| 6.617 Å | (50) |
| 6.126 Å | (38) |
| 3.506 Å | (74) |
| 3.326 Å | (66) |
Reference:
Grey, Ian E., Favreau, George, Mills, Stuart J., Mumme, W. Gus, Bougerol, Catherine, Brand, Helen E.A., Kampf, Anthony R., MacRae, Colin M., Shanks, Finlay (2021) Galeaclolusite, [Al6(AsO4)3(OH)9(H2O)4]⋅8H2O, a new bulachite-related mineral from Cap Garonne, France. Mineralogical Magazine, 85 (2) 142-148 doi:10.1180/mgm.2020.98
Comments:
From type description.
Type Occurrence of Galeaclolusite
General Appearance of Type Material:
Crusts and spheroids of white fibres up to 50 μm long by 0.4 μm wide and only 0.1 μm thick.
Place of Conservation of Type Material:
Type material is deposited in the mineralogical collections of the Museum Victoria, GPO Box 666, Melbourne, Victoria 3001, Australia, registration number M55455 (holotype), and the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue number 74874 (cotype)
Reference:
Grey, Ian E., Favreau, George, Mills, Stuart J., Mumme, W. Gus, Bougerol, Catherine, Brand, Helen E.A., Kampf, Anthony R., MacRae, Colin M., Shanks, Finlay (2021) Galeaclolusite, [Al6(AsO4)3(OH)9(H2O)4]⋅8H2O, a new bulachite-related mineral from Cap Garonne, France. Mineralogical Magazine, 85 (2) 142-148 doi:10.1180/mgm.2020.98
Synonyms of Galeaclolusite
Other Language Names for Galeaclolusite
Dutch:Galeaclolusiet
German:Galeaclolusit
Common Associates
Related Minerals - Strunz-mindat Grouping
| 8.DD. | Penberthycroftite | [Al6(AsO4)3(OH)9(H2O)5] · 8H2O |
| 8.DD. | Bettertonite | [Al6(AsO4)3(OH)9(H2O)5] · 11H2O |
| 8.DD. | Vargite | MnCu2Mn2(AsO4)2(OH)4(H2O)4 |
| 8.DD.05 | Luetheite | Cu2Al2(AsO4)2(OH)4 |
| 8.DD.05 | Chenevixite | Cu2Fe3+2(AsO4)2(OH)4 |
| 8.DD.10 | Akrochordite | MnMn2Mn2(AsO4)2(OH)4(H2O)4 |
| 8.DD.10 | Guanacoite | MgCu2Mg2(AsO4)2(OH)4(H2O)4 |
| 8.DD.15 | 'UM1981-32-PO:FeH' | Fe2+Fe3+6(PO4)4-x[PO3(OH)]x(OH)8 · 4H2O |
| 8.DD.15 | Afmite | Al3(OH)4(H2O)3(PO4)(PO3OH) · H2O |
| 8.DD.15 | Aheylite | (Fe2+,Zn)Al6(PO4)4(OH)8 · 4H2O |
| 8.DD.15 | 'Coeruleolactite' | |
| 8.DD.15 | Faustite | ZnAl6(PO4)4(OH)8 · 4H2O |
| 8.DD.15 | Planerite | Al6(PO4)2(PO3OH)2(OH)8 · 4H2O |
| 8.DD.15 | Chalcosiderite | CuFe3+6(PO4)4(OH)8 · 4H2O |
| 8.DD.15 | Turquoise | CuAl6(PO4)4(OH)8 · 4H2O |
| 8.DD.20 | Eosphorite | Mn2+Al(PO4)(OH)2 · H2O |
| 8.DD.20 | Ernstite | (Mn2+,Fe3+)Al(PO4)(OH,O)2 · H2O |
| 8.DD.20 | Lefontite | Fe2Al2Be(PO4)2(OH)6 |
| 8.DD.20 | Childrenite | Fe2+Al(PO4)(OH)2 · H2O |
| 8.DD.25 | Kobokoboite | Al6(PO4)4(OH)6 · 11H2O |
| 8.DD.30 | Smamite | Ca2Sb(OH)4[H(AsO4)2] · 6H2O |
| 8.DD.35 | 'Gutsevichite' | Al3(PO4)2(OH)3 · 8H2O |
| 8.DD.40 | 'Laubmannite (of Moore)' | (Fe3+,Fe2+,M)8+x(OH,H2O)9(H2O)2(PO4)5, M = Fe3+, Cu2+ or other metal cation, x ~ 0.1. |
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 Galeaclolusite
mindat.org URL:
https://www.mindat.org/min-55231.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 Galeaclolusite
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2020) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 58. European Journal of Mineralogy, 32 (6) 645-651 doi:10.5194/ejm-32-645-2020
Grey, Ian E., Favreau, George, Mills, Stuart J., Mumme, W. Gus, Bougerol, Catherine, Brand, Helen E.A., Kampf, Anthony R., MacRae, Colin M., Shanks, Finlay (2021) Galeaclolusite, [Al6(AsO4)3(OH)9(H2O)4]⋅8H2O, a new bulachite-related mineral from Cap Garonne, France. Mineralogical Magazine, 85 (2) 142-148 doi:10.1180/mgm.2020.98
Localities for Galeaclolusite
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.
France (TL) | |
| Grey et al. (2021) +2 other references |
UK | |
| Rumsey (2025a) |
Quick NavTopAbout GaleaclolusiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Penberthy Croft Mine, St Hilary, Cornwall, England, UK