Selenodantopaite
A valid IMA mineral species - pending publication
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Formula:
Ag5Bi13Se22
Colour:
dark grey
Lustre:
Metallic
Hardness:
3½
Specific Gravity:
7.403 (Calculated)
Crystal System:
Monoclinic
Name:
Selenodantopaite is named in accord with its composition and its relationship with dantopaite.
Type Locality:
Isostructural with:
The Se analogue of dantopaite.
Most probably identical with Unnamed (Se-analogue of Dantopaite) which was identified as the Se-analogue on the basis of quantitative EPMA data (which gave the empirical formula Ag4.53Cu0.53Bi12.68Pb0.59Se19.29S2.71, based on 22 (Se+S) atoms). It occurs as tiny (up to 8 micron), indistinct crystals in association with coffinite, uraninite and guanajuatite at the famous Clara mine, Black Forest (Kolitsch et al., 2019).
Most probably identical with Unnamed (Se-analogue of Dantopaite) which was identified as the Se-analogue on the basis of quantitative EPMA data (which gave the empirical formula Ag4.53Cu0.53Bi12.68Pb0.59Se19.29S2.71, based on 22 (Se+S) atoms). It occurs as tiny (up to 8 micron), indistinct crystals in association with coffinite, uraninite and guanajuatite at the famous Clara mine, Black Forest (Kolitsch et al., 2019).
Unique Identifiers
Mindat ID:
470999
Long-form identifier:
mindat:1:1:470999:8
IMA Classification of Selenodantopaite
Approved, Pending publication
Classification of Selenodantopaite
2.JA.05
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
J : Sulfosalts of PbS archetype
A : Galena derivatives with little or no Pb
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
J : Sulfosalts of PbS archetype
A : Galena derivatives with little or no Pb
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 |
|---|---|---|
| Sdnt | 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 Selenodantopaite
Metallic
Transparency:
Opaque
Colour:
Dark grey
Hardness:
3½ on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
7.403 g/cm3 (Calculated)
Optical Data of Selenodantopaite
Anisotropism:
distinct with light bluish white - light purplish brown rotation tints
Bireflectance:
weak
Reflectivity:
| Wavelength | R1 (%) | R2 (%) |
|---|---|---|
| 470nm | 48.3% | 44.9% |
| 546nm | 48.8% | 45.3% |
| 589nm | 48.4% | 45.1% |
| 650nm | 47.7% | 44.6% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 48.8%.
R1 shown in black, R2 shown in red
Colour in reflected light:
white to light grey
Internal Reflections:
none
Pleochroism:
Weak
Chemistry of Selenodantopaite
Mindat Formula:
Ag5Bi13Se22
Element Weights:
Elements listed:
Crystallography of Selenodantopaite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 13.670(4) Å, b = 4.140(1) Å, c = 19.282(6) Å
β = 106.38(111)°
β = 106.38(111)°
Ratio:
a:b:c = 3.302 : 1 : 4.657
Unit Cell V:
1,046.95 ų (Calculated from Unit Cell)
Z:
1
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.700 Å | (31) |
| 3.525 Å | (38) |
| 3.397 Å | (14) |
| 3.359 Å | (33) |
| 3.062 Å | (21) |
| 3.037 Å | (27) |
| 2.936 Å | (100) |
| 2.892 Å | (30) |
Reference:
Comments:
Powder X-ray diffraction data could not be collected, due to the paucity of available material. Consequently, powder X-ray diffraction data were calculated using the software PowderCell 2.3
Type Occurrence of Selenodantopaite
General Appearance of Type Material:
anhedral grains, up to 100 μm in size,
Place of Conservation of Type Material:
In the collections of the Department of Mineralogy and Petrology, National Museum, Cirkusová 1740, 19300 Praha 9, Czech Republic, catalogue number P1P 22/2023, and the Museo di Storia Naturale, Università di Pisa, Via Roma 79, Calci (PI), catalogue number 20068
Geological Setting of Type Material:
The crystallization of selenodantopaite is related to a a low-T hydrothermal event.
Associated Minerals at Type Locality:
Synonyms of Selenodantopaite
Other Language Names for Selenodantopaite
Dutch:Selenodantopaiet
German:Selenodantopait
Related Minerals - Strunz-mindat Grouping
| 2.JA. | Ferdowsiite | Ag8(Sb5As3)S16 |
| 2.JA. | Luboržákite | Mn2AsSbS5 |
| 2.JA. | Sangenaroite | Ag8(Sb8-xAsx)SΣ16 |
| 2.JA.05a | Pavonite | AgBi3S5 |
| 2.JA.05b | Grumiplucite | HgBi2S4 |
| 2.JA.05c | Kudriavite | (Cd,Pb)Bi2S4 |
| 2.JA.05d | Cupromakovickyite | Cu4AgPb2Bi9S18 |
| 2.JA.05e | Benjaminite | Ag3Bi7S12 |
| 2.JA.05i | Livingstonite | HgSb4S6(S2) |
| 2.JA.05h | Mozgovaite | PbBi4S7 |
| 2.JA.05 | Dantopaite | Ag5Bi13S22 |
| 2.JA.05a | Cupropavonite | Cu0.9Ag0.5Pb0.6Bi2.5S5 |
| 2.JA.05g | Borodaevite | Ag5(Bi,Pb,Fe)8(Sb,Bi)2S17 |
| 2.JA.05a | Cupromakopavonite | Ag3Cu8Pb4Bi19S38 |
| 2.JA.05d | Makovickyite | Cu1.12Ag0.81Pb0.27Bi5.35S9 |
| 2.JA.05f | Mummeite | Cu0.58Ag3.11Pb1.10Bi6.65S13 |
| 2.JA.10b | Kupčíkite | Cu3.4Fe0.6Bi5S10 |
| 2.JA.10d | Pizgrischite | (Cu,Fe)Cu14PbBi17S35 |
| 2.JA.10c | Hodrušite | Cu8Bi12S22 |
| 2.JA.10a | Cuprobismutite | Cu8AgBi13S24 |
| 2.JA.10e | Padĕraite | Cu7[(Cu,Ag)0.33Pb1.33Bi11.33]S22 |
| 2.JA.15 | Schapbachite | Ag0.4Pb0.2Bi0.4S |
| 2.JA.15 | Cuboargyrite | AgSbS2 |
| 2.JA.20 | Matildite | AgBiS2 |
| 2.JA.20 | Volynskite | AgBiTe2 |
| 2.JA.20 | Bohdanowiczite | AgBiSe2 |
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 Selenodantopaite
mindat.org URL:
https://www.mindat.org/min-470999.html
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External Links:
References for Selenodantopaite
Reference List:
Kolitsch, U.; Bayerl, R.; Topa, D. (2019) Neufunde aus der Grube Clara im mittleren Schwarzwald (V). Mineralien Welt, 30 (3). 12-27(as unnamed Se-analogue of dantopaite)
Localities for Selenodantopaite
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.
Czech Republic (TL) | |
| Bosi et al. (2024) +1 other reference |
Russia | |
| |
| Strelnikov M. V. et al. (2025) |