Kaatialaite
A valid IMA mineral species
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About Kaatialaite
There are lots of stones in Kaatiala to study
Kaatiala pegmatite, Kuortane, South Ostrobothnia, Finland
Kaatiala pegmatite, Kuortane, South Ostrobothnia, Finland
Formula:
Fe3+[AsO2(OH)2]3 · 5H2O
The water content appears to be variable (Raade et al., 1984); the synthetic compound has 5H2O.
Colour:
Pale grey, pale yellow, white, pale blue, greenish blue
Lustre:
Earthy
Specific Gravity:
2.64
Crystal System:
Monoclinic
Name:
Named by G. Raade, M.H. Mladeck, R. Kristiansen, and V.K. Din in 1984 for the type locality of Kaatiala pegmatite, Finland.
Type Locality:
Unique Identifiers
Mindat ID:
2126
Long-form identifier:
mindat:1:1:2126:1
IMA Classification of Kaatialaite
Approved
First published:
1984
Classification of Kaatialaite
8.CC.10
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
C : With only medium-sized cations, RO4:H2O = 1:1.5
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
C : With only medium-sized cations, RO4:H2O = 1:1.5
39.3.9.1
39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
3 : Miscellaneous
39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
3 : Miscellaneous
20.9.5
20 : Arsenates (also arsenates with phosphate, but without other anions)
9 : Arsenates of Fe
20 : Arsenates (also arsenates with phosphate, but without other anions)
9 : Arsenates of Fe
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 |
|---|---|---|
| Kaa | 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 Kaatialaite
Earthy
Transparency:
Translucent
Colour:
Pale grey, pale yellow, white, pale blue, greenish blue
Density:
2.64 g/cm3 (Measured) 2.64 g/cm3 (Calculated)
Comment:
Measured was with synthetic material
Optical Data of Kaatialaite
Type:
Biaxial (+)
RI values:
nα = 1.573 nβ = 1.574 nγ = 1.636
2V:
Measured: 15° , Calculated: 16°
Max. Birefringence:
δ = 0.063
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.
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.
Surface Relief:
Moderate
Dispersion:
none
Chemistry of Kaatialaite
Mindat Formula:
Fe3+[AsO2(OH)2]3 · 5H2O
The water content appears to be variable (Raade et al., 1984); the synthetic compound has 5H2O.
The water content appears to be variable (Raade et al., 1984); the synthetic compound has 5H2O.
Element Weights:
Elements listed:
Crystallography of Kaatialaite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 15.25 Å, b = 19.60 Å, c = 4.72 Å
β = 91.8°
β = 91.8°
Ratio:
a:b:c = 0.778 : 1 : 0.241
Unit Cell V:
1,410.11 ų (Calculated from Unit Cell)
Morphology:
Acicular; powder coatings.
Comment:
Space group (P21/n) and cell data for synthetic material (Boudjada & Guitel, 1981). Raade et al. (1984) suggest space group P21 or P21/m. Water content appears to vary, and therefore also unit-cell parameters (Raade et al., 1984).
Crystal Structure
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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) |
|---|---|---|---|---|---|---|---|
| 0009745 | Kaatialaite | Boudjada A, Guitel J C (1981) Structure cristalline d'un orthoarseniate acide de fer(III) pentahydrate: Fe(H2AsO4)3*5H2O Acta Crystallographica B37 1402-1405 |  | 1981 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 12.2 Å | (30) |
| 9.95 Å | (90) |
| 8.35 Å | (100) |
| 7.69 Å | (90) |
| 7.17 Å | (10) |
| 6.07 Å | (80) |
| 5.01 Å | (10) |
| 4.96 Å | (30) |
| 4.72 Å | (40) |
| 4.62 Å | (10) |
| 4.58 Å | (10) |
| 4.50 Å | (60) |
| 4.48 Å | (60) |
| 4.38 Å | (20) |
| 4.28 Å | (40) |
| 4.17 Å | (10) |
| 4.09 Å | (10) |
| 4.05 Å | (40) |
| 3.83 Å | (70) |
| 3.77 Å | (80) |
| 3.69 Å | (10) |
| 3.57 Å | (30) |
| 3.55 Å | (30) |
| 3.53 Å | (60) |
| 3.52 Å | (60) |
Comments:
ICDD (synthetic)
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47d : [Arsenates, antimonates, selenates, bismuthinates] |
Type Occurrence of Kaatialaite
General Appearance of Type Material:
Acicular aggregates and powdery coatings on löllingite.
Place of Conservation of Type Material:
Mineralogical-Geological Museum, University of Oslo, Oslo, Norway.
The Natural History Museum, London, England.
The Natural History Museum, London, England.
Geological Setting of Type Material:
Granite pegmatite
Associated Minerals at Type Locality:
Synonyms of Kaatialaite
Other Language Names for Kaatialaite
Common Associates
Associated Minerals Based on Photo Data:
| 15 photos of Kaatialaite associated with Claudetite | As2O3 |
| 11 photos of Kaatialaite associated with Native Arsenic | As |
| 9 photos of Kaatialaite associated with Arsenolite | As2O3 |
| 5 photos of Kaatialaite associated with Skutterudite | CoAs3 |
| 4 photos of Kaatialaite associated with Scorodite | Fe3+AsO4 · 2H2O |
| 3 photos of Kaatialaite associated with Proustite | Ag3AsS3 |
| 2 photos of Kaatialaite associated with Safflorite | (Co,Ni,Fe)As2 |
| 1 photo of Kaatialaite associated with Argentopyrite | AgFe2S3 |
| 1 photo of Kaatialaite associated with Quartz | SiO2 |
Related Minerals - Strunz-mindat Grouping
| 8.CC. | Correianevesite | Fe2+Mn2+2(PO4)2 · 3H2O |
| 8.CC.05 | Landesite | Mn2+3-xFe3+x(PO4)2(OH)x · (3-x)H2O |
| 8.CC.05 | Reddingite | (Mn2+,Fe2+)3(PO4)2 · 3H2O |
| 8.CC.05 | Garyansellite | Mg2Fe3+(PO4)2(OH) · 2H2O |
| 8.CC.05 | Phosphoferrite | (Fe2+,Mn2+)3(PO4)2 · 3H2O |
| 8.CC.05 | Kryzhanovskite | (Fe3+,Mn2+)3(PO4)2(OH,H2O)3 |
| 8.CC.15 | Leogangite | Cu10(AsO4)4(SO4)(OH)6 · 8H2O |
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 Kaatialaite
mindat.org URL:
https://www.mindat.org/min-2126.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
References for Kaatialaite
Reference List:
Raade, Gunnar, Mladeck, Micael H., Kristiansen, Roy, Din, Victor K. (1984) Kaatialaite, a new ferric arsenate mineral from Finland. American Mineralogist, 69 (3-4) 383-387
Localities for Kaatialaite
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.
Czech Republic | |
| Lapis 2002 (7/8) |
| 86. +1 other reference | |
| Plašil J et al. (2006) |
| Filippi (2004) |
Finland (TL) | |
| Raade et al. (1984) |
France | |
| SARP et al. (2002) |
| Favreau et al. (2024) |
| Georges FAVREAU collection & EDX ... +1 other reference | |
Germany | |
| |
| |
| Walenta (1987) +1 other reference | |
| Lorenz (2004) |
| Schmetzer et al. (1986) |
| SEM-EDS and XRD by Joy Desor and ... |
| Wittern (2001) |
| Lapis 1994 (10) |
Greece | |
| Rieck et al. (2018) |
| no description given yet] +1 other reference | |
Italy | |
| Marco Bonifazi collection |
Spain | |
| Kankita y Kaatialaita de las Minas de Varilongo (Santa Comba, La Coruña, España) |
USA | |
| Cesbron et al. (1992) |
Quick NavTopAbout KaatialaiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Jáchymov, Karlovy Vary District, Karlovy Vary Region, Czech Republic