Zálesíite
A valid IMA mineral species
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About Zálesíite
Formula:
CaCu6(AsO4)2(AsO3OH)(OH)6 · 3H2O
Colour:
Pale green, grass-green, pale bluish green
Lustre:
Vitreous, Resinous, Silky
Hardness:
2 - 3
Specific Gravity:
3.49
Crystal System:
Hexagonal
Member of:
Name:
Named after the type locality, Zálesí uranium deposit, Zálesí, Javorník, Jeseník District, Olomouc Region, Czech Republic.
Mixite Group.
The arsenate analogue of Calciopetersite and the Ca-analogue of plumboagardite.
Ca-dominant member, with Ca > sum of REE.
Visually indistinguishable from other greenish members of the mixite group. Often only unambiguously identifiable by reliable SEM-EDS analyses or quantitative electron microprobe analyses.
Note: Prior to the approval of the name zálesíite, the preliminary designation "Agardite-(Ca)" was used by some authors.
The arsenate analogue of Calciopetersite and the Ca-analogue of plumboagardite.
Ca-dominant member, with Ca > sum of REE.
Visually indistinguishable from other greenish members of the mixite group. Often only unambiguously identifiable by reliable SEM-EDS analyses or quantitative electron microprobe analyses.
Note: Prior to the approval of the name zálesíite, the preliminary designation "Agardite-(Ca)" was used by some authors.
Name Encoding
ASCII-7:
Zalesiite
Unique Identifiers
Mindat ID:
7026
Long-form identifier:
mindat:1:1:7026:9
Similar Names
IMA Classification of Zálesíite
Approved
IMA Formula:
Cu2+6Ca(As5+O4)2(As5+O3OH)(OH)6·3H2O
Approval year:
1997
Classification of Zálesíite
8.DL.15
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
L : With large and medium-sized cations, (OH, etc.):RO4 = 2:1
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
L : With large and medium-sized cations, (OH, etc.):RO4 = 2:1
42.5.1.7
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)7(XO4)3Zq·xH2O
42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)7(XO4)3Zq·xH2O
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 |
|---|---|---|
| Zál | 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 Zálesíite
Vitreous, Resinous, Silky
Transparency:
Transparent, Translucent
Colour:
Pale green, grass-green, pale bluish green
Streak:
Greenish white, white
Hardness:
2 - 3 on Mohs scale
Density:
3.49(3) g/cm3 (Measured) 3.50 g/cm3 (Calculated)
Optical Data of Zálesíite
Type:
Uniaxial (+)
RI values:
nω = 1.688(2) nε = 1.765(2)
Max. Birefringence:
δ = 0.077
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:
Very High (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 uniaxial interference figure - the conoscopic
(convergent-light, Bertrand-lens-in) view, for a grain cut with the optic axis
centred and vertical. The coloured rings are isochromatics, computed with the
same physics as the Michel-Lévy bar above; the dark cross is the isogyre.
For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.
For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.
Pleochroism:
Weak
Comments:
O = pale yellow-green, E = pale green
Chemistry of Zálesíite
Mindat Formula:
CaCu6(AsO4)2(AsO3OH)(OH)6 · 3H2O
Element Weights:
Crystallography of Zálesíite
Crystal System:
Hexagonal
Class (H-M):
6/m - Dipyramidal
Space Group:
P63/m
Cell Parameters:
a = 13.571(1) Å, c = 5.880(1) Å
Ratio:
a:c = 1 : 0.433
Unit Cell V:
937.85 ų (Calculated from Unit Cell)
Z:
2
Twinning:
on {100}
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 11.64 Å | (100) |
| 4.431 Å | (41) |
| 3.254 Å | (22) |
| 2.9347 Å | (42) |
| 2.6932 Å | (29) |
| 2.5624 Å | (30) |
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 Zálesíite
General Appearance of Type Material:
transparent hexagonal crystals, up to 100 µm long and 10 µm wide
powdery coatings, cross-fiber veinlets, and tufts of acicular crystals
powdery coatings, cross-fiber veinlets, and tufts of acicular crystals
Place of Conservation of Type Material:
Natural History Museum, National Museum Prague
Museum of the Bohemian Paradise, in Turnov, Czech Republic
Museum of the Bohemian Paradise, in Turnov, Czech Republic
Associated Minerals at Type Locality:
Synonyms of Zálesíite
Other Language Names for Zálesíite
Relationship of Zálesíite to other Species
Member of:
Other Members of Mixite Group:
| Agardite-(Ce) | CeCu6(AsO4)3(OH)6 · 3H2O | Hex. 6/m : P63/m |
| Agardite-(La) | LaCu6(AsO4)3(OH)6 · 3H2O | Hex. 6/m : P63/m |
| Agardite-(Nd) | NdCu6(AsO4)3(OH)6 · 3H2O | Hex. 6/m : P63/m |
| Agardite-(Y) | YCu6(AsO4)3(OH)6 · 3H2O | Hex. 6/m : P63/m |
| Calciopetersite | CaCu6(PO4)2(PO3OH)(OH)6 · 3H2O | Hex. 6/m : P63/m |
| Goudeyite | AlCu6(AsO4)3(OH)6 · 3H2O | Hex. |
| Mixite | BiCu6(AsO4)3(OH)6 · 3H2O | Hex. 6/m : P63/m |
| Petersite-(Ce) | CeCu6(PO4)3(OH)6 · 3H2O | Hex. 6/m : P63/m |
| Petersite-(La) | LaCu6(PO4)3(OH)6 · 3H2O | Hex. 6/m : P63/m |
| Petersite-(Y) | YCu6(PO4)3(OH)6 · 3H2O | Hex. |
| Plumboagardite | PbCu6(AsO4)2(AsO3OH)(OH)6 · 3H2O | Hex. 6/m : P63/m |
Common Associates
Associations Based on Photo Data:
| 22 photos of Zálesíite associated with Malachite | Cu2(CO3)(OH)2 |
| 17 photos of Zálesíite associated with Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| 16 photos of Zálesíite associated with Aragonite | CaCO3 |
| 14 photos of Zálesíite associated with Azurite | Cu3(CO3)2(OH)2 |
| 12 photos of Zálesíite associated with Quartz | SiO2 |
| 11 photos of Zálesíite associated with Cornwallite | Cu5(AsO4)2(OH)4 |
| 8 photos of Zálesíite associated with Conichalcite | CaCu(AsO4)(OH) |
| 7 photos of Zálesíite associated with Heterogenite | Co3+O(OH) |
| 7 photos of Zálesíite associated with Goldhillite | Cu5Zn(AsO4)2(OH)6 · H2O |
| 5 photos of Zálesíite associated with Olivenite | Cu2(AsO4)(OH) |
Related Minerals - Strunz-mindat Grouping
| 8.DL.05 | Foggite | CaAl(PO4)(OH)2 · H2O |
| 8.DL.10 | Fluorowardite | NaAl3(PO4)2F2(OH)2(H2O)2 |
| 8.DL.10 | Wardite | NaAl3(PO4)2(OH)4 · 2H2O |
| 8.DL.10 | Millisite | (Na,K)CaAl6(PO4)4(OH)9 · 3H2O |
| 8.DL.10 | Cyrilovite | NaFe3+3(PO4)2(OH)4 · 2H2O |
| 8.DL.15 | Petersite-(Ce) | CeCu6(PO4)3(OH)6 · 3H2O |
| 8.DL.15 | Agardite-(Nd) | NdCu6(AsO4)3(OH)6 · 3H2O |
| 8.DL.15 | Agardite-(Y) | YCu6(AsO4)3(OH)6 · 3H2O |
| 8.DL.15 | Agardite-(Ce) | CeCu6(AsO4)3(OH)6 · 3H2O |
| 8.DL.15 | 'Agardite-(Dy)' | (Dy,La)Cu6(AsO4)3(OH)6 · 3H2O |
| 8.DL.15 | Agardite-(La) | LaCu6(AsO4)3(OH)6 · 3H2O |
| 8.DL.15 | Petersite-(Y) | YCu6(PO4)3(OH)6 · 3H2O |
| 8.DL.15 | Mixite | BiCu6(AsO4)3(OH)6 · 3H2O |
| 8.DL.15 | Petersite-(La) | LaCu6(PO4)3(OH)6 · 3H2O |
| 8.DL.15 | Goudeyite | AlCu6(AsO4)3(OH)6 · 3H2O |
| 8.DL.15 | Calciopetersite | CaCu6(PO4)2(PO3OH)(OH)6 · 3H2O |
| 8.DL.15 | Plumboagardite | PbCu6(AsO4)2(AsO3OH)(OH)6 · 3H2O |
| 8.DL.20 | Dugganite | Pb3Zn3(AsO4)2(TeO6) |
| 8.DL.20 | Wallkilldellite | Ca2Mn2+3(AsO4)2(OH)4 · 9H2O |
| 8.DL.20 | Wallkilldellite-(Fe) | (Ca,Cu)4Fe2+6(AsO4,SiO4)4(OH,O)8 · 18H2O |
| 8.DL.20 | Cheremnykhite | Pb3Zn3(VO4)2(TeO6) |
| 8.DL.20 | Kuksite | Pb3Zn3(PO4)2(TeO6) |
| 8.DL.25 | Angastonite | CaMgAl2(PO4)2(OH)4 · 7H2O |
| 8.DL.30 | Långbanshyttanite | Pb2Mn2Mg(AsO4)2(OH)4 · 6H2O |
Fluorescence of Zálesíite
none
Other Information
Notes:
slowly soluble in dilute HCl.
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 Zálesíite
mindat.org URL:
https://www.mindat.org/min-7026.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Zálesíite
Reference List:
Sejkora, J., Řídkošil, T., Šrein, V. (1999) Zálesíite, a new mineral of the mixite group, from Zálesí, Rychlebské hory Mts., Czech Republic. Neues Jahrbuch für Mineralogie - Abhandlungen, 175 (2). 105-124 doi:10.1127/njma/175/1999/105
Localities for Zálesíite
Showing 127 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.
Australia | |
| Bayliss et al. (1966) +1 other reference |
Austria | |
| Blaß et al. (1997) |
| Kolitsch et al. (2017) |
| C.Auer (2024) |
| Kolitsch (2014) |
| Postl (2004) |
| Jakely (Hrsg.) |
| Auer (2022) |
| Kolitsch et al. (2011) |
Chile | |
| Leon Hupperichs. |
| samples analysed by Gerhard Moehn. |
| SEM-EDS by Joy Desor |
Czech Republic (TL) | |
| Čejka +6 other references |
France | |
| |
| Wittern et al. (1997) |
| Wittern et al. (1997) +1 other reference |
| Thierry Brunsperger |
| N. Meisser2001 and 2002 Analysis +1 other reference |
| N. Meisser 2000 EDS analysis. +1 other reference |
| - (2002) |
| Wittern et al. (1997) |
| Escande et al. (1973) +6 other references |
| Escande et al. (1973) +7 other references | |
| N. Meisser 2001 EDS Analysis. +2 other references |
| Berbain et al. (2019) |
| Lheur C. et al. (2002) |
| Berbain (2010) |
| François Garric collection; Georges ... |
| Favreau et al. (2024) |
| Georges FAVREAU collection and EDX ... +1 other reference | |
Germany | |
| Gröbner (2017) |
| www.mineralienatlas.de (2021) |
| Wittern (2001) +1 other reference |
| Walenta (1997) |
| https://www.mineralienatlas.de/?l=53526 |
| Walenta (1992) +1 other reference |
| Walenta (1992) +1 other reference |
| Walenta (1992) |
| Wittern (2001) |
| Wittern (2001) |
| Wittern (2001) +1 other reference |
| Lorenz et al. (2007) |
| Eigenfunde/Halde Manfred Gross |
| Koch (2008) |
| Hans-Jürgen Haas collection |
| personal message W.Hajek |
| Witzke et al. (2000) |
| Knoll (2009) |
Greece | |
| |
| Fritz Schreiber collection | |
| Möckel (2000) | |
| |
| Witzke et al. (2000) +1 other reference | |
| Blaß et al. (1998) |
Ireland | |
| Moreton et al. (2006) |
Italy | |
| Bortolozzi et al. (2017) |
| Bortolozzi et al. (2015) +1 other reference |
| Pagano et al. (2001) |
| Redazionale (2005) | |
| Redazione (2005) |
| Bruno Marello collection |
| M.E. Ciriotti (2005) +1 other reference |
| Collection Giuseppe Finello - Photo ID: ... |
| Giuseppe Finello find & collection (SEM- EDS) | |
| Ciriotti et al. (2019) |
| Piccoli et al. (2007) |
| Ciriotti et al. (2010) |
| Ciriotti et al. (2010) |
| Conedera M. et al. (2016) |
| Gasparetto et al. (2026) |
| Gasparetto et al. (2014) |
| Erica Bittarello +3 other references |
| Ferretti et al. (2019) |
| Published on LIBVRNA N°1 may 2021. Analysed by Spectralab srl (SEM/EDS and Raman) |
Japan | |
| Petrov (n.d.) |
| Tanaka et al. (2009) |
| SHIROSE et al. (2011) +2 other references |
Morocco | |
| Favreau et al. (2006) |
| Favreau et al. (2006) | |
| Favreau (2026) |
| Favreau et al. (2006) |
| Favreau et al. (2006) | |
| Georges FAVREAU collection + EDS ... |
| Barral (2023) | |
Slovakia | |
| Ferenc et al. (2020) |
| Hoppanová E. et al. (2021) |
Spain | |
| Georges FAVREAU collection & EDX ... |
| Favreau et al. (2013) |
| José Miguel Sola | |
| Rewitzer et al. (2016) +1 other reference |
| Rewitzer et al. (2018) |
| Sainz de Baranda Graf (2021) |
| Sainz de Baranda Graf (2021) |
| Calvo Rebollar (2015) |
| Calvo et al. (2007) |
| Joan Abella i Creus (Joanabellacreus@gmail.com) |
| Salván et al. (2024) |
| Fabre (n.d.) +1 other reference |
| Adrián Pesudo |
| Honrubia et al. (2002) |
Switzerland | |
| Roth et al. (2025) |
| Cuchet et al. (2012) |
| |
| Kolitsch (1998) | |
| Ansermet (2012) |
UK | |
| Golley et al. (1995) |
| Golley et al. (1995) | |
| - (2006) +1 other reference |
| - (2006) | |
| Mike Leppington collection (visual ID) |
| EDX - Natural History Museum (M.Rumsey) |
| Peter Lord collection +1 other reference |
| Hubbard et al. (2005) |
USA | |
| Adams (2017) |
| R. Housley (2008) |
| Eckel et al. (1997) |
| Ream (2004) |
| Ream (2004) |
| Reiner Mielke & Pavel Kartashov |
| Newmont Mining Corporation |
| Silver Coin Mine. Compact Disc. Paul ... |
| Identified by Christopher Emproto with ... |
| Loomis (2011) |
| Chuck Adan collection. Analyzed by Joy ... |
| Thorne (n.d.) |
| Patrick Haynes. ID via Tony Kampf | |
| Paul M. Adams +4 other references |
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Clara Mine, Oberwolfach, Ortenaukreis, Freiburg Region, Baden-Württemberg, Germany