Kamarizaite

Fe3+3(AsO4)2(OH)3 · 3H2O
IMA status
  • Approved
IMA symbol
Kmr
IMA approved
2008
Also known as
  • IMA2008-017
  • Kamarezaite
  • Kamarizaiet

Where it forms, where it's found

Type locality
Kamariza mines (Kamareza mines)
  1. Agios Konstantinos (Kamariza)
  2. Lavreotiki
  3. East Attica
  4. Attica
  5. Greece
5recorded occurrences
Source · OpenStreetMap

Safety & handling

Physical

Hardness
123456789103/ 10 MOHS
  1. 1Talc
  2. 2Gypsum
  3. 3Calcite
  4. 4Fluorite
  5. 5Apatite
  6. 6Orthoclase
  7. 7Quartz
  8. 8Topaz
  9. 9Corundum
  10. 10Diamond
Colour
yellow to beige
Streak
light yellow
Cleavage
None Observed
Density
3.16 g/cm³

Optical

Optical type
Biaxial (+)
Notes

Min RI 1.825 Max RI 1.835

Crystallography

Crystal system
Triclinic
Space group
#2
Cell parameters
a = 7.671(2) Å · b = 8.040(2) Å · c = 10.180(2) Å
Cell angles
α = 68.31(3) ° · β = 75.35(3) ° · γ = 63.52(3) °
Ratio a:b:c
1 : 1.048 : 1.327
Unit cell volume
519.3 ų
Z
1
Type-locality form

Fine grained aggregates

Comment

Originally assumed to be orthorhombic.

Chemical composition

Constituent elements
Mass composition breakdown
ElementAtoms At. mass g/mol Mass g/molMass share
8OOxygenOxygen1415.999223.986
40.69%
26FeIronIron355.845167.535
30.44%
33AsArsenicArsenic274.922149.844
27.22%
1HHydrogenHydrogen91.0089.072
1.65%
Total550.437100.00%

Mass share = atoms × atomic mass ÷ molar mass × 100

From IMA formula

Synonyms

  • IMA2008-017
  • Kamarezaite
  • Kamarizaiet

In other languages

German
IMA 2008-017 · Kamarizait
Italian
kamarizaite

Classification

Strunz
10th ed.

8.DC.32

  • 8Phosphates, Arsenates, VanadatesClass
  • 8.DPhosphates, etc. with additional anions, with H2ODivision
  • 8.DCWith only medium-sized cations, (OH, etc.):RO4 = 1:1 and < 2:1Group
  • 8.DC.32KamarizaiteSpecies
Dana
8th ed.

42.12.05

  • 42Hydrated Phosphates, Etc.containing Hydroxyl or HalogenClass
  • 42.12(AB)4(XO4)3Zq·xH2OType
  • 42.12.05— unnamed intermediate level —Group
  • 42.12.05KamarizaiteSpecies

Group, growth & confusion

Commonly confused with
1 mineral

Literature, links & citation

Citations
  1. Kolitsch, U., Lengauer, C.L., Giester, G. (2014) Crystal structures and isotypism of the iron arsenate kamarizaite and the iron phosphate tinticite. 92nd Annual Meeting of the DMG, Jena, Germany, September 21-24; abstract in Programme, 257.
  2. 2009Chukanov, N.V., Pekov, I.V., Möckel, S., Mukhanova, A.A., Belakovskiy, D.I., Levitskaya, L.A., Bekenova, G.K. (2009) Kamarizaite Fe3+3(AsO4)2(OH)3·3H2O - a new mineral arsenate analogue of tinticite. Zapiski Rossiiskogo Mineralogicheskogo Obshchetstva: 138(3): 100-108.
  3. 2010Chukanov, N. V., Pekov, I. V., Möckel, S., Mukhanova, A. A., Belakovsky, D. I., Levitskaya, L. A., Bekenova, G. K. (2010) Kamarizaite, Fe33+(AsO4)2(OH)3·3H2O, a new mineral species, arsenate analogue of tinticite. Geology of Ore Deposits, 52 (7). 599-605 doi:10.1134/s1075701510070093DOI: 10.1134/s1075701510070093
  4. 2016Kolitsch, Uwe, Lengauer, Christian L., Giester, Gerald (2016) Crystal structures and isotypism of the iron(III) arsenate kamarizaite and the iron(III) phosphate tinticite. European Journal of Mineralogy, 28 (1) 71-81 doi:10.1127/ejm/2015/0027-2485DOI: 10.1127/ejm/2015/0027-2485
  5. 2018Majzlan, Juraj, Nielsen, Ulla Gro, Dachs, Edgar, Benisek, Artur, Drahota, Petr, Kolitsch, Uwe, Herrmann, Julia, Bolanz, Ralph, Števko, Martin (2018) Thermodynamic properties of mansfieldite (AlAsO4·2H2O), angelellite (Fe4(AsO4)2O3) and kamarizaite (Fe3(AsO4)2(OH)3·3H2O) Mineralogical Magazine, 82 (6) 1333-1354 doi:10.1180/mgm.2018.107DOI: 10.1180/mgm.2018.107
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Kamarizaite — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/kamarizaite-38696},
  note      = {Accessed 2026-05-11}
}