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Jan “Honza” Hloušek
pale pink (some with purplish or violet tints)
Specific Gravity:
2.993 (Calculated)
Crystal System:
Named in honor of Dr. Jan “Honza” Hloušek (10 March 1950, Karlovy Vary, Czechoslovakia – 27 April 2014, Jáchymov, Czech Republic), prominent mineralogist and famous collector of minerals from the Jáchymov ore district. He co-described eight new minerals and wrote a two volume book entitled Jachymov-Joachimsthal.
Isostructural with:
Ni-dominant analogue of burgessite.

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Classification of HonzaiteHide

Approval Year:
First Published:

Physical Properties of HonzaiteHide

pale pink (some with purplish or violet tints)
pale pink
{0 1 0}
2.993 g/cm3 (Calculated)

Optical Data of HonzaiteHide

Biaxial (+)
RI values:
nα = 1.601(2) nβ = 1.608(2) nγ = 1.629(2)
Measured: 60° (1)
Max Birefringence:
δ = 0.028
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of HonzaiteHide

IMA Formula:
Ni2(AsO3OH)2 · 5H2O

Crystallography of HonzaiteHide

Crystal System:
Class (H-M):
2/m - Prismatic
Space Group:
Cell Parameters:
a = 4.6736(6) Å, b = 9.296(1) Å, c = 12.592(1) Å
β = 99.115(8)°
a:b:c = 0.503 : 1 : 1.355
Unit Cell V:
540.2 ų

X-Ray Powder DiffractionHide

Powder Diffraction Data:
7.431 Å(100)
6.215 Å(18)
3.717 Å(9)
3.360 Å(3)
3.254 Å(7)
3.078 Å(7)
3.005 Å(5)
2.568 Å(7)
From Type Description.

Type Occurrence of HonzaiteHide

General Appearance of Type Material:
Irregular to hemispherical microcrystalline aggregates up to 5mm in diameter on strongly weathered ore gangue. Tiny prismatic crystals, up to 30 μm long, are rarely observed on the surface of the aggregates.
Place of Conservation of Type Material:
Type material is deposited in the collections of the Department of Mineralogy and Petrology, National Museum of Prague, Prague, Czech Republic, catalogue number P1N 38.099
Empirical Formula of Type Material:
Chemical Analysis of Type Material:
MgO0.24 %
CaO0.10 %
FeO0.21 %
NiO16.51 %
CoO12.71 %
CuO0.55 %
ZnO0.84 %
P2O50.26 %
As2O545.82 %
SO30.52 %
H2O (calc.)22.15 %
Total:99.91 %
Geological Setting of Type Material:
It forms during weathering of primary nickelskutterudite and tennantite under strongly acidic conditions.
Sejkora, J., Plášil, J., Kampf, A.R. (2018) Honzaite, (Ni,Co)2(AsO3OH)2(H2O)5, a new Ni-dominant analogue of burgessite, from Jáchymov, Czech Republic. European Journal of Mineralogy: 30: 989-997.

Synonyms of HonzaiteHide

Fluorescence of HonzaiteHide

does not fluoresce under either short- or long-wave ultraviolet light

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 HonzaiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Sejkora, J., Plášil, J. and Kampf, A.R. (2014) Honzaite, IMA 2014-105. CNMNC Newsletter No. 25, June 2015, page 530. Mineralogical Magazine: 79: 529-535.
Sejkora, J., Plášil, J., Kampf, A.R. (2018) Honzaite, (Ni,Co)2(AsO3OH)2(H2O)5, a new Ni-dominant analogue of burgessite, from Jáchymov, Czech Republic. European Journal of Mineralogy: 30: 989-997.

Internet Links for HonzaiteHide

Localities for HonzaiteHide

ⓘ - 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 (TL)
  • Karlovy Vary Region
    • Karlovy Vary District
Sejkora, J., Plášil, J., Kampf, A.R. (2018) Honzaite, (Ni,Co)2(AsO3OH)2(H2O)5, a new Ni-dominant analogue of burgessite, from Jáchymov, Czech Republic. European Journal of Mineralogy: 30: 989-997.
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