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About KaatialaiteHide

There are lots of stones in Kaatiala to study

Kaatiala pegmatite, Kuortane, South Ostrobothnia, Finland
Fe(H2AsO4)3 · 5H2O
The water content appears to be variable (Raade et al., 1984); the synthetic compound has 5H2O.
Pale grey, pale yellow, white, pale blue, greenish blue
Specific Gravity:
Crystal System:
Named by G. Raade, M.H. Mladeck, R. Kristiansen, and V.K. Din in 1984 for the type locality of Kaatiala pegmatite, Finland.
This page provides mineralogical data about Kaatialaite.

Classification of KaatialaiteHide

First published:

C : Phosphates without additional anions, with H2O
C : With only medium-sized cations, RO4:H2O = 1:1.5

3 : Miscellaneous

20 : Arsenates (also arsenates with phosphate, but without other anions)
9 : Arsenates of Fe

Physical Properties of KaatialaiteHide

Pale grey, pale yellow, white, pale blue, greenish blue
2.64 g/cm3 (Measured)    2.64 g/cm3 (Calculated)
Measured was with synthetic material

Optical Data of KaatialaiteHide

Biaxial (+)
RI values:
nα = 1.573 nβ = 1.574 nγ = 1.636
Measured: 15° , Calculated: 16°
Max Birefringence:
δ = 0.063
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of KaatialaiteHide

Fe(H2AsO4)3 · 5H2O

The water content appears to be variable (Raade et al., 1984); the synthetic compound has 5H2O.
IMA Formula:
Fe3+(H2AsO4)3 · 5H2O

Crystallography of KaatialaiteHide

Crystal System:
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 15.25 Å, b = 19.60 Å, c = 4.72 Å
β = 91.8°
a:b:c = 0.778 : 1 : 0.241
Unit Cell V:
1,410.11 ų (Calculated from Unit Cell)
Acicular; powder coatings.
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 StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0009745KaatialaiteBoudjada A, Guitel J C (1981) Structure cristalline d'un orthoarseniate acide de fer(III) pentahydrate: Fe(H2AsO4)3*5H2O Acta Crystallographica B37 1402-14051981synthetic0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
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)
ICDD (synthetic)

Type Occurrence of KaatialaiteHide

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.
Geological Setting of Type Material:
Granite pegmatite
Associated Minerals at Type Locality:

Synonyms of KaatialaiteHide

Other Language Names for KaatialaiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
7 photos of Kaatialaite associated with ClaudetiteAs2O3
6 photos of Kaatialaite associated with ArsenicAs
5 photos of Kaatialaite associated with ArsenoliteAs2O3
4 photos of Kaatialaite associated with ScoroditeFe3+AsO4 · 2H2O
2 photos of Kaatialaite associated with Safflorite(Co,Ni,Fe)As2
1 photo of Kaatialaite associated with ProustiteAg3AsS3
1 photo of Kaatialaite associated with QuartzSiO2
1 photo of Kaatialaite associated with ArgentopyriteAgFe2S3

Related Minerals - Nickel-Strunz GroupingHide

8.CC.CorreianevesiteFe2+Mn2+2(PO4)2 · 3H2OOrth. mmm (2/m 2/m 2/m)
8.CC.05Garyansellite(Mg,Fe)3(PO4)2(OH,O) · 1.5H2OOrth. mmm (2/m 2/m 2/m)
8.CC.05LandesiteMn2+3-xFe3+x(PO4)2(OH)x · (3-x)H2OOrth.
8.CC.05Phosphoferrite(Fe2+,Mn2+)3(PO4)2 · 3H2OOrth. mmm (2/m 2/m 2/m) : Pmna
8.CC.05Reddingite(Mn2+,Fe2+)3(PO4)2 · 3H2OOrth. mmm (2/m 2/m 2/m) : Pmna
8.CC.15LeogangiteCu10(AsO4)4(SO4)(OH)6 · 8H2OMon. 2/m : B2/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

20.9.1AngelelliteFe3+4(AsO4)2O3Tric. 1 : P1
20.9.2ScoroditeFe3+AsO4 · 2H2OOrth. mmm (2/m 2/m 2/m)
20.9.3KaňkiteFeAsO4 · 3.5H2OMon. 2 : P2
20.9.4FerrisymplesiteFe3+3(AsO4)2(OH)3 · 5H2O
20.9.6SymplesiteFe2+3(AsO4)2 · 8H2OTric. 1 : P1
20.9.7ParasymplesiteFe2+3(AsO4)2 · 8H2OMon. 2/m : B2/m
20.9.8NatropharmacosideriteNa2Fe3+4(AsO4)3(OH)5 · 7H2OIso. 4 3m : P4 3m
20.9.9PharmacosideriteKFe3+4(AsO4)3(OH)4 · 6-7H2OIso. 4 3m : P4 3m
20.9.10KolfaniteCa2Fe3+3O2(AsO4)3 · 2H2OMon.
20.9.11ArseniosideriteCa2Fe3+3(AsO4)3O2 · 3H2OMon. 2/m : B2/b
20.9.12YukoniteCa3Fe3+(AsO4)2(OH)3 · 5H2OOrth. mm2
20.9.13DussertiteBaFe3+3(AsO4)(AsO3OH)(OH)6Trig. 3m (3 2/m) : R3m
20.9.14Liskeardite[(Al,Fe)32(AsO4)18(OH)42(H2O)22] · 52H2OOrth.
20.9.15MapimiteZn2Fe3+3(AsO4)3(OH)4 · 10H2OMon.
20.9.16OgdensburgiteCa2Fe3+4(Zn,Mn2+)(AsO4)4(OH)6 · 6H2OOrth. mmm (2/m 2/m 2/m) : Cmmm
20.9.17WalentaiteFe3+3(P0.84As0.16O4)2(O,OH)6As3+2.56Ca0.42Na0.28Mn2+0.35Fe2+0.30O6.1(OH)0.9(H2O)0.9Orth. mmm (2/m 2/m 2/m) : Imma

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for KaatialaiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Boudjada, A., Guitel, J.C. (1981) Structure cristalline d'un orthoarséniate acide de fer(III) pentahydraté: Fe(H2AsO4)3·5H2O. Acta Crystallographica: B37: 1402-1405.
Raade, G., Mladeck, M.H., Kristiansen, R., Din, V.K. (1984) Kaatialaite, a new ferric arsenate mineral from Finland. American Mineralogist: 69: 383-387.
Schmetzer, K., Medenbach, O. (1986) Kaatialaite from Nieder-Beerbach, Odenwald - a second occurrence. Neues Jahrbuch für Mineralogie, Monatshefte: 1986: 337-342.
Ondruš, P., Veselovský, F., Hloušek, J., Skála, R., Vavřín, I., Frýda, J., Čejka, J., Gabašová, A. (1997) Secondary minerals of the Jáchymov (Joachimsthal) ore district. Journal of the Czech Geological Society, 42, 3-69.
Steciuk, G., Majzlan, J., Plášil, J. (2021): Hydrogen disorder in kaatialaite Fe[AsO2(OH)2]5H2O from Jáchymov, Czech Republic: determination from low-temperature 3D electron diffraction. IUCrJ 8, 116-123.

Internet Links for KaatialaiteHide

Localities for KaatialaiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Czech Republic
  • Karlovy Vary Region
    • Karlovy Vary District
      • Jáchymov
Lapis 2002(7/8), 47
Sehrig, M. & Dietel, J. (2011): Silber, Uran, Arsen und Heilquellen: Auf Mineraliensuche in Jáchymov, einem der ältesten Bergwerke der Welt. Lapis 36 (7-8), 67-71; 86.
    • Sokolov District
      • Horní Slavkov
Plašil J, Sejkora J, Ondruš P, Veselovský F, Beran P, Goliáš V (2006): Supergene minerals in the Horní Slavkov uranium ore district, Czech Republic. Journal of the Czech Geological Society 51, 149-158.
Finland (TL)
  • South Ostrobothnia
    • Kuortane
Raade et al.(1984): Kaatialaite, a new ferric arsenate mineral from Finland. American Mineralogist. 69, 383-387
  • Nouvelle-Aquitaine
    • Haute-Vienne
      • Bellac
        • Vaulry
          • Vaulry Mines
Patrice Queneau Collection
  • Baden-Württemberg
    • Freiburg Region
      • Rottweil
        • Schenkenzell
          • Wittichen
            • Burgfelsen
No reference listed
            • Heubach Valley
No reference listed
Walenta, K. (1987) Neue Mineralien von Wittichen. Lapis. 12 (11): 23-24; Walenta, K. (1992): Die Mineralien des Schwarzwaldes, Weise (Munich), 1992
  • Hesse
    • Darmstadt
      • Darmstadt-Dieburg
        • Mühltal
          • Nieder-Beerbach
Schmetzer, K. & Medenbach, O. (1986): Kaatialaite from Nieder-Beerbach, Odenwald - a second occurrence. Neues Jahrbuch fuer Mineralogie, Monatshefte 1986, 337-342.
  • Rhineland-Palatinate
    • Rhein-Lahn District
      • Bad Ems-Nassau
        • Frücht
SEM-EDS and XRD by Joy Desor and Gerhard Möhn
  • Saxony
    • Erzgebirgskreis
      • Marienberg
        • Lauta
Wittern: "Mineralfundorte in Deutschland", 2001
    • Zwickau district
      • Hartenstein
Lapis 1994(10), 36-39
  • Attica
    • East Attica
      • Lavreotiki
Kolitsch, U., Rieck, B., Brandstätter, F., Schreiber, F., Fabritz, K. H., Blaß, G. & Gröbner, J. (2014): Neufunde aus dem altem Bergbau und den Schlacken von Lavrion (I). Mineralien-Welt 25 (1), 60-75 (in German). [identification announced; no description given yet]
          • Agios Konstantinos (Kamariza)
            • Kamariza Mines (Kamareza Mines)
              • Hilarion Mine
Rieck, B., Kolitsch, U., Voudouris, P., Giester, G. and Tzeferis, P. (2018): Weitere Neufunde aus Lavrion, Griechenland. Mineralien-Welt 29 (5), 32-77 (in German).
  • Galicia
    • A Coruña
      • Santa Comba
Kankita y Kaatialaita de las Minas de Varilongo (Santa Comba, La Coruña, España) DOI: 10.7597/acopios2171-7788.2012.7
  • Utah
    • Tooele Co.
      • Gold Hill Mining District (Clifton Mining District)
        • Gold Hill
Mineralogical Magazine 1992 56 : 71-73
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