Betekhtinite (original) (raw)
A valid IMA mineral species - grandfathered
About BetekhtiniteHide
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Formula:
Pb2(Cu,Fe)22-24S15
Cu>>Fe. Previously given as (Cu,Fe)21Pb2S15; Krivovichev & Yakovenchuk (2017) proved this to be wrong.
Specific Gravity:
5.96 - 6.05
Crystal System:
Orthorhombic
Name:
Named in honor of Anatolii Georgievich Betekhtin (Анатолий Георгиевич Бетехтин) (24 February (8 March) 1897, Strigino, Vologda province, Russian Empire - 20 April 1962, Moscow, USSR), mineralogist and economic geologist.
Co-Type Localities:
ⓘ Fortschritt shaft I (Wolf shaft), Volkstedt, Eisleben, Mansfeld-Südharz, Saxony-Anhalt, Germany
ⓘ Ernst-Thälmann shaft (Vitzthum shaft), Hübitz, Siersleben, Gerbstedt, Mansfeld-Südharz, Saxony-Anhalt, Germany
This page provides mineralogical data about Betekhtinite.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:650:5
66dbf9f1-0661-4511-b543-5fdcdb37bd82
IMA Classification of BetekhtiniteHide
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Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
(Cu,Fe)21Pb2S15
Type description reference:
Classification of BetekhtiniteHide
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2.BE.05
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
B : Metal Sulfides, M: S > 1: 1 (mainly 2: 1)
E : With Pb (Bi)
2.16.8.1
2 : SULFIDES
16 : Miscellaneous
3.6.10
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
6 : Sulphides etc. of Sb and Pb
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference |
|---|---|---|
| Bkh | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Bkh | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of BetekhtiniteHide
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Cleavage:
Distinct/Good
In three directions
Density:
5.96 - 6.05 g/cm3 (Measured) 6.14 g/cm3 (Calculated)
Optical Data of BetekhtiniteHide
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Anisotropism:
Strong, distinctly colored
Reflectivity:
| Wavelength | R1 | R2 |
|---|---|---|
| 400nm | 34.0% | 35.4% |
| 420nm | 33.7% | 34.6% |
| 440nm | 33.4% | 33.8% |
| 460nm | 33.2% | 33.3% |
| 480nm | 32.9% | 33.0% |
| 500nm | 32.8% | 32.6% |
| 520nm | 32.6% | 32.3% |
| 540nm | 32.5% | 32.1% |
| 560nm | 32.3% | 32.0% |
| 580nm | 32.0% | 31.8% |
| 600nm | 31.8% | 31.8% |
| 620nm | 31.6% | 31.9% |
| 640nm | 31.4% | 32.2% |
| 660nm | 31.4% | 32.4% |
| 680nm | 31.2% | 32.4% |
| 700nm | 31.2% | 32.4% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 35.4%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Cream, stronger yellowish cream perpendicular to elongation
Chemistry of BetekhtiniteHide
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Mindat Formula:
Pb2(Cu,Fe)22-24S15
Cu>>Fe. Previously given as (Cu,Fe)21Pb2S15; Krivovichev & Yakovenchuk (2017) proved this to be wrong.
Crystallography of BetekhtiniteHide
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Crystal System:
Orthorhombic
Class (H-M):
m m m _(_2/_m_2/_m_2/m ) - Dipyramidal
Cell Parameters:
a = 14.67 Å, b = 22.80 Å, c = 3.85 Å
Ratio:
a:b:c = 0.643 : 1 : 0.169
Unit Cell V:
1,287.73 ų (Calculated from Unit Cell)
Morphology:
Needles to 2 cm in length.
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0009232 | Betekhtinite | Dornberger-Schiff K, Hohne E (1959) Die kristallstruktur des betechtinit Pb2(Cu,Fe)21S15 Acta Crystallographica 12 646-651 |  |
1959 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.37 Å | (20) |
| 5.65 Å | (50) |
| 4.77 Å | (50) |
| 4.32 Å | (20) |
| 3.56 Å | (20) |
| 3.49 Å | (20) |
| 3.33 Å | (30) |
| 3.08 Å | (80) |
| 2.94 Å | (100) |
| 2.74 Å | (30) |
| 2.68 Å | (50) |
| 2.52 Å | (50) |
| 2.48 Å | (50) |
| 2.40 Å | (50) |
| 2.35 Å | (70) |
| 2.30 Å | (30) |
| 2.26 Å | (30) |
| 2.11 Å | (30) |
| 2.06 Å | (15) |
| 2.02 Å | (10) |
| 1.995 Å | (10) |
| 1.934 Å | (60) |
| 1.899 Å | (10) |
| 1.888 Å | (15) |
| 1.830 Å | (90) |
| 1.762 Å | (40) |
| 1.680 Å | (5) |
| 1.506 Å | (20) |
| 1.399 Å | (10) |
| 1.355 Å | (20) |
| 1.338 Å | (20) |
| 1.305 Å | (20) |
| 1.2828 Å | (10) |
| 1.2653 Å | (20) |
| 1.2555 Å | (15) |
| 1.2391 Å | (10) |
| 1.2059 Å | (20) |
| 1.1681 Å | (5) |
| 1.1215 Å | (30) |
| 1.0990 Å | (20) |
| 1.0930 Å | (50) |
| 1.0890 Å | (10) |
| 1.0600 Å | (10) |
| 1.0380 Å | (10) |
| 1.0150 Å | (10) |
| 0.9840 Å | (20) |
| 0.9700 Å | (20) |
Comments:
ICDD 25-1223. Bulancak, Turkey.
Geological EnvironmentHide
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Type Occurrence of BetekhtiniteHide
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Co-Type Localities:
ⓘ Fortschritt shaft I (Wolf shaft), Volkstedt, Eisleben, Mansfeld-Südharz, Saxony-Anhalt, Germany
ⓘ Ernst-Thälmann shaft (Vitzthum shaft), Hübitz, Siersleben, Gerbstedt, Mansfeld-Südharz, Saxony-Anhalt, Germany
Place of Conservation of Type Material:
Mineral Museum, Humboldt University, Berlin, Germany
Geological Setting of Type Material:
Associated Minerals at Type Locality:
Synonyms of BetekhtiniteHide
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Other Language Names for BetekhtiniteHide
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Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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Fluorescence of BetekhtiniteHide
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Other InformationHide
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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 BetekhtiniteHide
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References for BetekhtiniteHide
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Localities for BetekhtiniteHide
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This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 
symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
Locality ListHide
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- 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). 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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.