Lemanskiite
A valid IMA mineral species
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About Lemanskiite
Chet Lemanski
Formula:
NaCaCu5(AsO4)4Cl · 3H2O
Originally thought to have 5 waters, and therefore to be a polymorph of lavendulan, but revised to 3 waters by Zubkova et al. (2018).
Colour:
Sky blue
Lustre:
Vitreous
Hardness:
2 - 3
Specific Gravity:
3.78
Crystal System:
Monoclinic
Name:
Named for Chester (Chet) S. Lemanski, Jr. (b. 1947), a New Jersey, USA, collector and former President of the Franklin-Ogdensburg Mineralogical Society, board member and former Vice President of the Franklin Mineral Museum, former hard rock miner (Sterling Mine, NJ) and professional investigator, now retired.
Masses and aggregated groups of crystals in and on matrix; massive, filling spaces between breccia fragments. Easy to confuse with lavendulan, with which it may occur simultaneously.
The mineral was initially described as a polymorph of lavendulan. The studies by Dubrovka et al. (2018) have shown that lemanskiite is not a polymorph of lavendulan.
Note that Ondruš et al. (2006) reported that lavendulan from Lavrion, Greece, once powdered transformed to lemanskiite in a few days.
The mineral was initially described as a polymorph of lavendulan. The studies by Dubrovka et al. (2018) have shown that lemanskiite is not a polymorph of lavendulan.
Note that Ondruš et al. (2006) reported that lavendulan from Lavrion, Greece, once powdered transformed to lemanskiite in a few days.
Unique Identifiers
Mindat ID:
9658
Long-form identifier:
mindat:1:1:9658:0
IMA Classification of Lemanskiite
Classification of Lemanskiite
8.DG.05
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
G : With large and medium-sized cations, (OH, etc.):RO4< 0.5:1
8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
G : With large and medium-sized cations, (OH, etc.):RO4< 0.5:1
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 |
|---|---|---|
| Lmk | 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 Lemanskiite
Vitreous
Transparency:
Translucent
Colour:
Sky blue
Streak:
Sky blue
Hardness:
2 - 3 on Mohs scale
Cleavage:
Perfect
(001)
(001)
Parting:
None.
Fracture:
Irregular/Uneven
Density:
3.78 g/cm3 (Measured) 3.86 g/cm3 (Calculated)
Optical Data of Lemanskiite
Type:
Uniaxial (-)
RI values:
nω = 1.749 nε = 1.647
Max. Birefringence:
δ = 0.102
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:
Moderate
Pleochroism:
Strong
Comments:
O dark green-blue, E light blue-green
Chemistry of Lemanskiite
Mindat Formula:
NaCaCu5(AsO4)4Cl · 3H2O
Originally thought to have 5 waters, and therefore to be a polymorph of lavendulan, but revised to 3 waters by Zubkova et al. (2018).
Originally thought to have 5 waters, and therefore to be a polymorph of lavendulan, but revised to 3 waters by Zubkova et al. (2018).
Element Weights:
Crystallography of Lemanskiite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Cell Parameters:
a = 9.250(2) Å, b = 10.0058(10) Å, c = 10.412(17) Å
β = 97.37°
β = 97.37°
Ratio:
a:b:c = 0.924 : 1 : 1.041
Unit Cell V:
921.7 ų
Z:
2
Morphology:
Thin tetragonal plates. Crystals bent to the angstrom level.
Cell data and system have been updated with information provided in Dubrovka and al. (2018).
Cell data and system have been updated with information provided in Dubrovka and al. (2018).
Twinning:
None mentioned.
Comment:
Originally (Ondruš et al., 2006) assumed to be tetragonal (space group P4122 or P4322), with a 9.9758(4), c 36.714(1) Å, V 3653.6(2) Å3.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 9.60 Å | (9) |
| 9.18 Å | (100) |
| 4.59 Å | (32) |
| 4.17 Å | (10) |
| 3.06 Å | (15) |
| 2.924 Å | (5) |
| 2.606 Å | (6) |
Comments:
Possibly affected by preferred orientation.
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] | |
| 47g : [Halogen-bearing surface weathering minerals] |
Type Occurrence of Lemanskiite
General Appearance of Type Material:
Rosette-shaped aggregates of thin platey crystals.
Place of Conservation of Type Material:
National Museum of the Czech Republic, Praha, Czech Republic, number P1p 14/99.
Geological Setting of Type Material:
Occurs in the oxidized zone of an enargite-rich gold deposit in an arid environment.
Associated Minerals at Type Locality:
Synonyms of Lemanskiite
Other Language Names for Lemanskiite
Dutch:Lemanskiiet
German:Lemanskiit
Japanese:レマンスキー石
Simplified Chinese:四方氯砷钠铜石
Spanish:Lemanskiita
Traditional Chinese:四方氯砷鈉銅石
Common Associates
Associations Based on Photo Data:
| 24 photos of Lemanskiite associated with Lammerite | Cu3(AsO4)2 |
| 4 photos of Lemanskiite associated with Conichalcite | CaCu(AsO4)(OH) |
| 3 photos of Lemanskiite associated with Chenevixite | Cu2Fe3+2(AsO4)2(OH)4 |
| 2 photos of Lemanskiite associated with Lavendulan | NaCaCu5(AsO4)4Cl · 5H2O |
| 2 photos of Lemanskiite associated with Azurite | Cu3(CO3)2(OH)2 |
| 2 photos of Lemanskiite associated with Malachite | Cu2(CO3)(OH)2 |
| 1 photo of Lemanskiite associated with Olivenite | Cu2(AsO4)(OH) |
Related Minerals - Strunz-mindat Grouping
| 8.DG. | Jasonsmithite | Mn2+4ZnAl(PO4)4(OH)(H2O)7 · 3.5H2O |
| 8.DG. | Davidbrownite-(NH4) | (NH4)5(V4+O)2(C2O4)[PO2.75(OH)1.25]4 · 3H2O |
| 8.DG. | Relianceite-(K) | K4Mg(V4+O)2(C2O4)(PO3OH)4(H2O)10 |
| 8.DG. | Pleysteinite | [(H2O)0.5K0.5]2Mn2Al3(PO4)4F2 · 14H2O |
| 8.DG.05 | Fluor-rewitzerite | [(H2O)K]Mn2(Al2Ti)(PO4)4(OF)(H2O)10 · 4H2O |
| 8.DG.05 | Lavendulan | NaCaCu5(AsO4)4Cl · 5H2O |
| 8.DG.05 | Sampleite | NaCaCu5(PO4)4Cl · 5H2O |
| 8.DG.05 | Zdenĕkite | NaPbCu5(AsO4)4Cl · 5H2O |
| 8.DG.05 | Rewitzerite | [K(H2O)]Mn2Al3(PO4)4(OH)2 · 14H2O |
| 8.DG.10 | Dacostaite | K(Mg2Al)[Mg(H2O)6]2(AsO4)2F6 · 2H2O |
Fluorescence of Lemanskiite
None
Other Information
Thermal Behaviour:
When heated hydrothermally in a quartz capsule at 200°C for 48 hours, it transforms to olivenite.
The DTA curve shows strong endothermic peaks at 70°C and 210°C connected with a loss of a part of the H2O molecules, and small exothermic peaks at 310°C and 520°C.
The DTA curve shows strong endothermic peaks at 70°C and 210°C connected with a loss of a part of the H2O molecules, and small exothermic peaks at 310°C and 520°C.
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 Lemanskiite
mindat.org URL:
https://www.mindat.org/min-9658.html
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Please feel free to link to this page.
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References for Lemanskiite
Reference List:
Ondruš, P., Veselovský, F., Skála, R., Sejkora, J., Pažout, R., Fryda, J., Gabašová, A., Vajdak, J. (2006) Lemanskiite, NaCaCu5(AsO4)4Cl·5H2O, a new mineral species from the Abundancia mine, Chile. The Canadian Mineralogist, 44 (2) 523-531 doi:10.2113/gscanmin.44.2.523
Giester, Gerald; Kolitsch, Uwe; Leverett, Peter; Turner, Peter; Williams, Peter A. (2007) The crystal structures of lavendulan, sampleite, and a new polymorph of sampleite. European Journal of Mineralogy, 19 (1). 75-93 doi:10.1127/0935-1221/2007/0019-0075
Zubkova, N. V., Pekov, I. V., Chukanov, N. V., Kasatkin, A. V., Ksenofontov, D. A., Yapaskurt, V. O., Britvin, S. N., Pushcharovsky, D. Yu. (2018) Redefinition of Lemanskiite: New Mineralogical Data, Crystal Structure, and Revised Formula NaCaCu5(AsO4)4Cl · 3H2O. Geology of Ore Deposits, 60 (7) 594-606 doi:10.1134/s1075701518070115
Localities for Lemanskiite
Showing 11 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.
Bolivia | |
| Kempff et al. (La Paz, 2009) +1 other reference |
Chile | |
| Ondruš et al. (2006) |
| Ondruš et al. (2006) |
| Ondruš et al. (2006) | |
| Zubkova et al. (2018) | |
Greece | |
| Mintreasure specimen |
| Rieck et al. (2018) | |
| Ondruš et al. (2006) | |
Iran | |
| Ondruš et al. (2006) |
Spain | |
| Joan Rosell (2023) |
| Ondruš et al. (2006) +1 other reference |
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Guanaco Mine, Taltal, Antofagasta Province, Antofagasta, Chile