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
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 for Standard |
|---|---|---|
| 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. 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:
Moderate (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
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
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
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
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Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
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Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
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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) |
|---|---|---|---|---|---|---|---|
| 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
Associations 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 Zeunerite | Cu(UO2)2(AsO4)2 · 12H2O |
| 1 photo of Kaatialaite associated with Quartz | SiO2 |
| 1 photo of Kaatialaite associated with Argentopyrite | AgFe2S3 |
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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References for Kaatialaite
Reference List:
Boudjada, A.; Guitel, J. C. (1981) Structure cristalline d'un orthoarséniate acide de fer(III) pentahydraté: Fe(H2AsO4)3.5H2O. Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry, 37 (7). p.1402-1405. doi:10.1107/s0567740881006043
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
Showing 21 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.
Czech Republic | |
| Hloušek et al. (2002) |
| 86. +1 other reference | |
| Plášil 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 | |
| Rodríguez-Vázquez et al. (2012) |
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