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About KaatialaiteHide

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).

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:
Claudetite7 photos of Kaatialaite associated with Claudetite on
Arsenic6 photos of Kaatialaite associated with Arsenic on
Arsenolite5 photos of Kaatialaite associated with Arsenolite on
Scorodite4 photos of Kaatialaite associated with Scorodite on
Safflorite2 photos of Kaatialaite associated with Safflorite on
Proustite1 photo of Kaatialaite associated with Proustite on
Quartz1 photo of Kaatialaite associated with Quartz on
Argentopyrite1 photo of Kaatialaite associated with Argentopyrite on

Related Minerals - Nickel-Strunz GroupingHide

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.
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
20.9.8Natropharmacosiderite(Na,K)Fe3+4(AsO4)3(OH)4 · 6-7H2OIso. 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
20.9.17WalentaiteH(Ca,Mn2+,Fe2+)Fe3+3(AsO4,PO4)4 · 7H2OOrth.

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.

Internet Links for KaatialaiteHide

Localities for KaatialaiteHide

ⓘ - 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
    • Horní Slavkov (Schlaggenwald)
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.
    • Krušné Hory Mts (Erzgebirge)
      • Jáchymov District (St Joachimsthal)
        • Jáchymov (St Joachimsthal)
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.
Finland (TL)
  • Western and Inner Finland Region
    • Kuortane
Raade et al.(1984): Kaatialaite, a new ferric arsenate mineral from Finland. American Mineralogist. 69, 383-387
  • Nouvelle-Aquitaine
    • Haute-Vienne
      • Nantiat
        • Vaulry
          • Vaulry Mines
Patrice Queneau Collection
  • Baden-Württemberg
    • Black Forest
      • Schenkenzell
        • Wittichen
          • Burgfelsen
No reference listed
          • Heubach Valley
No reference listed
K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
  • Hesse
    • Odenwald
      • Mühltal
        • Nieder-Beerbach
Schmetzer, K. & Medenbach, O. (1986): Kaatialaite from Nieder-Beerbach, Odenwald - a second occurrence. Neues Jahrbuch fuer Mineralogie, Monatshefte 1986, 337-342.
  • Saxony
    • Erzgebirge
      • Marienberg District
        • Lauta
Wittern: "Mineralfundorte in Deutschland", 2001
      • Schlema-Hartenstein District
Lapis 1994(10), 36-39
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium; Lavreotiki Municipality)
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 [St Constantine] (Kamariza)
          • Kamariza Mines (Kamareza Mines)
            • Hilarion area
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 (La 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 District (Clifton District)
        • Gold Hill
Mineralogical Magazine 1992 56 : 71-73
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