Ardaite
A valid IMA mineral species
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About Ardaite
Formula:
Pb19Sb13S35Cl7
Colour:
Greenish gray or bluish green
Lustre:
Metallic
Hardness:
2½ - 3
Specific Gravity:
6.44 (Calculated)
Crystal System:
Monoclinic
Name:
For the Arda River, Bulgaria which passes through the type locality.
A rare example of a lead chlorosulfoantimonide.
Chemically related to dadsonite; also similar to 'UM1980-08-S:ClPbSb' (which has similar PXRD pattern), 'UM1980-09-S:ClPbSb', and 'UM1980-10-S:ClPbSb'.
Chemically related to dadsonite; also similar to 'UM1980-08-S:ClPbSb' (which has similar PXRD pattern), 'UM1980-09-S:ClPbSb', and 'UM1980-10-S:ClPbSb'.
Unique Identifiers
Mindat ID:
320
Long-form identifier:
mindat:1:1:320:7
Similar Names
IMA Classification of Ardaite
Approved
IMA Formula:
Pb2+17Sb3+15S2-35Cl9
Approval year:
1979
First published:
1982
Classification of Ardaite
2.LB.30
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
L : Unclassified Sulfosalts
B : With essential Pb
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
L : Unclassified Sulfosalts
B : With essential Pb
2.15.1.1
2 : SULFIDES
15 : Chlor-sulfides
2 : SULFIDES
15 : Chlor-sulfides
6.5.8
6 : Sulphosalts - Sulphostannates, Sulphogermanates,Sulpharsenates, Sulphantimonates, Sulphovanadates and Sulphohalides
5 : Sulphohalides
6 : Sulphosalts - Sulphostannates, Sulphogermanates,Sulpharsenates, Sulphantimonates, Sulphovanadates and Sulphohalides
5 : Sulphohalides
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 |
|---|---|---|
| Ada | 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 Ardaite
Metallic
Transparency:
Opaque
Colour:
Greenish gray or bluish green
Hardness:
2½ - 3 on Mohs scale
Density:
6.44 g/cm3 (Calculated)
Optical Data of Ardaite
Anisotropism:
Distinct
Reflectivity:
| Wavelength | R1 (%) | R2 (%) |
|---|---|---|
| 440nm | 31.3% | 33.2% |
| 480nm | 32.1% | 34.4% |
| 520nm | 32.3% | 35.1% |
| 580nm | 31.7% | 34.7% |
| 620nm | 31.1% | 33.9% |
| 660nm | 30.6% | 32.8% |
| 700nm | 30.3% | 31.8% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 35.1%.
R1 shown in black, R2 shown in red
Pleochroism:
Weak
Chemistry of Ardaite
Mindat Formula:
Pb19Sb13S35Cl7
Element Weights:
Elements listed:
Common Impurities:
Ag,Fe
Crystallography of Ardaite
Crystal System:
Monoclinic
Cell Parameters:
a = 21.09 Å, b = 22.11 Å, c = 8.05 Å
β = 103.02°
β = 103.02°
Ratio:
a:b:c = 0.954 : 1 : 0.364
Unit Cell V:
3,657.21 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Aggregates of acicular crystals to 50 microns
Comment:
Point Group: n.d; Space Group: n.d
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.24 Å | (20) |
| 3.90 Å | (20) |
| 3.43 Å | (100) |
| 3.13 Å | (40) |
| 2.83 Å | (80) |
| 2.36 Å | (20) |
| 1.90 Å | (30) |
Comments:
Synthetic.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) | |
| High-? alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Geological Setting:
Polymetallic ore deposits
Type Occurrence of Ardaite
General Appearance of Type Material:
As aggregates of acicular crystals, to 2 µm, as isolated inclusions in sulfides and sulfosalts.
Place of Conservation of Type Material:
National Museum of Natural History, Sofia, Bulgaria.
National Museum "Earth and Man", Sofia, Bulgaria.
National Museum "Earth and Man", Sofia, Bulgaria.
Associated Minerals at Type Locality:
Synonyms of Ardaite
Other Language Names for Ardaite
Common Associates
Associations Based on Photo Data:
| 4 photos of Ardaite associated with Galena | PbS |
| 1 photo of Ardaite associated with Arsenopyrite | FeAsS |
| 1 photo of Ardaite associated with Sphalerite | ZnS |
Related Minerals - Strunz-mindat Grouping
| 2.LB. | Ciriottiite | Cu(Cu,Ag)3Pb19(Sb,As)22(As2)S56 |
| 2.LB. | Hayyanite | Cu5Ag11Pb76Sb71As17(As2+)8S224 |
| 2.LB. | Wenqingite | Pb5(AsS3)2(Ge2S6) |
| 2.LB.05 | Miharaite | Cu4FePbBiS6 |
| 2.LB.30 | Launayite | Cu2Pb20(Sb,As)26S60 |
| 2.LB.30 | Sorbyite | CuPb9(Sb,As)11S26 |
| 2.LB.30 | Playfairite | Pb16(Sb,As)19S44Cl |
| 2.LB.30 | Sterryite | Cu(Ag,Cu)3Pb19(Sb,As)22(As2)S56 |
| 2.LB.30 | Madocite | Pb19(Sb,As)16S43 |
| 2.LB.35 | Larosite | (Cu,Ag)21PbBiS13 |
| 2.LB.40 | Mazzettiite | Ag3HgPbSbTe5 |
| 2.LB.40 | Petrovicite | Cu3HgPbBiSe5 |
| 2.LB.45 | Crerarite | Pt2-x(Bi,Pb)11(S,Se)11 |
| 2.LB.50 | Quijarroite | Cu6HgPb2Bi4Se12 |
| 2.LB.55 | Znamenskyite | Pb4In2Bi4S13 |
Other Information
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 Ardaite
mindat.org URL:
https://www.mindat.org/min-320.html
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References for Ardaite
Reference List:
Breskovska, Vesselina V., Mozgova, Nadejda N., Bortnikov, Nicolay S., Gorshkov, Anatoly I., Tzepin, Anatoly I. (1981) New data on chlorine sulfosalts. Bulletin de Minéralogie, 104 (6) 757-762 doi:10.3406/bulmi.1981.7521
Breskovska, V. V., Mozgova, N. N., Bortnikov, N. S., Gorshkov, A. I., Tsepin, A. I. (1982) Ardaite—a new lead-antimony chlorosulphosalt. Mineralogical Magazine, 46 (340) 357-361 doi:10.1180/minmag.1982.046.340.10
Dunn, Pete J., Fleischer, Michael (1983) New mineral names. American Mineralogist, 68 (5-6) 642-645 (abs. of Breskovska et al., 1982; https://rruff.info/uploads/AM68_642.pdf)
Moëlo, Yves, Makovicky, Emil, Mozgova, Nadejda N., Jambor, John L., Cook, Nigel, Pring, Allan, Paar, Werner, Nickel, Ernest H., Graeser, Stephan, Karup-Møller, Sven, Balic-unic, Tonči, Mumme, William G., Vurro, Filippo, Topa, Dan (2008) Sulfosalt systematics: a review. Report of the sulfosalt sub-committee of the IMA Commission on Ore Mineralogy. European Journal of Mineralogy, 20 (1) 7-62 doi:10.1127/0935-1221/2008/0020-1778
Localities for Ardaite
Showing 2 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.
Bulgaria (TL) | |
| Breskovska et al. (1982) |
Sweden | |
| Burke et al. (1981) |
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Gruvåsen mines, Persberg ore district, Filipstad, Värmland County, Sweden