Dyscrasite
A valid IMA mineral species - grandfathered
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About Dyscrasite
Formula:
Ag3Sb
Colour:
Silver White
Lustre:
Metallic
Hardness:
3½ - 4
Specific Gravity:
9.712
Crystal System:
Orthorhombic
Name:
From δνσκράσις, a bad alloy.
This page provides mineralogical data about Dyscrasite.
Unique Identifiers
Mindat ID:
1342
Long-form identifier:
mindat:1:1:1342:6
GUID
(UUID V4):
(UUID V4):
869b3e39-3aa4-4757-928e-0a5fc3de60de
IMA Classification of Dyscrasite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Ag3+xSb1-x (x ≈ 0.2)
Classification of Dyscrasite
2.AA.35
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
A : Alloys
A : Alloys of metalloids with Cu, Ag, Au
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
A : Alloys
A : Alloys of metalloids with Cu, Ag, Au
2.2.1.1
2 : SULFIDES
2 : AmBnXp, with (m+n):p = 3:1
2 : SULFIDES
2 : AmBnXp, with (m+n):p = 3:1
1.48
1 : Elements and Alloys (including the arsenides, antimonides and bismuthides of Cu, Ag and Au)
1 : Elements and Alloys (including the arsenides, antimonides and bismuthides of Cu, Ag and Au)
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 |
|---|---|---|
| Dys | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Dyscrasite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Dyscrasite
Metallic
Transparency:
Opaque
Colour:
Silver White
Comment:
Tarnishes to lead gray, yellowish or black
Streak:
Silver-white
Hardness:
3½ - 4 on Mohs scale
Hardness:
VHN100=153 - 179 kg/mm2 - Vickers
Tenacity:
Sectile
Cleavage:
Distinct/Good
Distinct on {001} {001}
Imperfect on {110}
Distinct on {001} {001}
Imperfect on {110}
Fracture:
Irregular/Uneven
Comment:
Sectile, but brittle
Density:
9.712 g/cm3 (Measured) 9.720 g/cm3 (Calculated)
Optical Data of Dyscrasite
Anisotropism:
Weak
Reflectivity:
| Wavelength | R1 | R2 |
|---|---|---|
| 400nm | 57.0% | 57.7% |
| 420nm | 57.7% | 59.0% |
| 440nm | 58.3% | 60.1% |
| 460nm | 59.1% | 61.2% |
| 480nm | 59.6% | 61.7% |
| 500nm | 59.9% | 62.1% |
| 520nm | 60.0% | 62.4% |
| 540nm | 60.1% | 62.7% |
| 560nm | 60.0% | 62.9% |
| 580nm | 59.8% | 63.0% |
| 600nm | 59.6% | 63.0% |
| 620nm | 59.5% | 63.0% |
| 640nm | 59.4% | 63.1% |
| 660nm | 59.3% | 63.0% |
| 680nm | 59.3% | 63.1% |
| 700nm | 59.6% | 63.4% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 63.4%.
R1 shown in black, R2 shown in red
Pleochroism:
Weak
Chemistry of Dyscrasite
Mindat Formula:
Ag3Sb
Elements listed:
Common Impurities:
Hg
Crystallography of Dyscrasite
Crystal System:
Orthorhombic
Class (H-M):
mm2 - Pyramidal
Space Group:
Pmm2
Cell Parameters:
a = 3.008 Å, b = 4.828 Å, c = 5.214 Å
Ratio:
a:b:c = 0.623 : 1 : 1.08
Unit Cell V:
75.72 ų (Calculated from Unit Cell)
Z:
1
Morphology:
Pyramidal crystals, prismatic to platy, striated; granular, foliated, massive
Twinning:
On {110} giving pseudohexagonal forms and V-shapes
Crystallographic forms of Dyscrasite
Crystal Atlas:
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Dyscrasite - {111}, {021}
3d models and HTML5 code kindly provided by
www.smorf.nl.
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Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0005121 | Dyscrasite | Scott J D (1976) Refinement of the crystal structure of dyscrasite, and its implications for the structure of allargentum The Canadian Mineralogist 14 139-142 |  | 1976 | 0 | 293 | |
| 0017988 | Dyscrasite | Peacock M, Berry L (1940) Roentgenographic observations on ore minerals _cod_database_code 1011092 University of Toronto Studies, Geological Series 44 47-69 | 1940 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.29 Å | (100) |
| 2.42 Å | (40) |
| 1.370 Å | (40) |
| 2.61 Å | (30) |
| 1.771 Å | (30) |
| 1.506 Å | (30) |
| 1.278 Å | (30) |
Comments:
St. Andreasberg, Germany.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-𝑇 alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Geological Setting:
Hydrothermal veins, especially Ni-Co-Ag-As veins.
Type Occurrence of Dyscrasite
Place of Conservation of Type Material:
No designated type material.
Synonyms of Dyscrasite
Other Language Names for Dyscrasite
French:Argent antimoniale
Dyscrase
Dyscrase
German:Dyskrasit
Antimonsilber
Discrasit
Silberspießglanz
Spiessglanzsilber
Spießglanz-Silber
Spiessglassilber
Stibiotriargentit
Antimonsilber
Discrasit
Silberspießglanz
Spiessglanzsilber
Spießglanz-Silber
Spiessglassilber
Stibiotriargentit
Russian:Дискразит
Simplified Chinese:锑银矿
Common Associates
Associated Minerals Based on Photo Data:
| 151 photos of Dyscrasite associated with Calcite | CaCO3 |
| 146 photos of Dyscrasite associated with Silver | Ag |
| 96 photos of Dyscrasite associated with Arsenic | As |
| 92 photos of Dyscrasite associated with Allargentum | (Ag1-xSbx) |
| 86 photos of Dyscrasite associated with Löllingite | FeAs2 |
| 52 photos of Dyscrasite associated with Stibarsen | AsSb |
| 50 photos of Dyscrasite associated with Actinolite | ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2 |
| 48 photos of Dyscrasite associated with Galena | PbS |
| 33 photos of Dyscrasite associated with Antimony | Sb |
| 30 photos of Dyscrasite associated with Pyrargyrite | Ag3SbS3 |
Related Minerals - Strunz-mindat Grouping
| 2.AA. | Trigodomeykite | Cu3-xAs |
| 2.AA.10a | Algodonite | (Cu1-xAsx) |
| 2.AA.10b | Domeykite | Cu3As |
| 2.AA.10d | Koutekite | Cu5As2 |
| 2.AA.15 | Novákite | (Cu,Ag)21As10 |
| 2.AA.20 | Cuprostibite | Cu2(Sb,Tl) |
| 2.AA.25 | Kutinaite | Ag6Cu14As7 |
| 2.AA.30 | Allargentum | (Ag1-xSbx) |
| 2.AA.40 | Maldonite | Au2Bi |
| 2.AA.45 | Stistaite | SnSb |
| 2.AA.50 | Zaccariniite | RhNiAs |
| 2.AA.55 | Dienerite | Ni3As |
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.
Industrial Uses:
Minor silver ore
Internet Links for Dyscrasite
mindat.org URL:
https://www.mindat.org/min-1342.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
Mineral Dealers:
References for Dyscrasite
Reference List:
Localities for Dyscrasite
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 | |
| Stevens (1972) |
| Stanton (1953) | |
| McKinnon et al. (2017) +3 other references |
| Leverett et al. (2005) |
| Edwards (1953) +1 other reference |
| Downes (2007) | |
| Ramdohr (1950) |
| Ramdohr (1950) | |
| Ramdohr (1950) |
| Rocks & Min.:62:224-225. +2 other references | |
| Ramdohr (1950) | |
| Ramdohr (1950) |
| Birch et al | |
| Ramdohr (1950) | |
| Ramdohr (1950) | |
| Ramdohr (1950) | |
| Teale et al. (2006) | |
| Canadian Mineralogist (1984) |
| Sielecki (1988) |
| Xu (1997) |
| an example of Broken Hill-type mineralization in the eastern succession et al. (8) +2 other references |
| Paul |
| Burns (1964) |
Azerbaijan | |
| - (2005) |
Bolivia | |
| Kempff et al. (La Paz, 2009) |
| Wilson (2001) |
Bulgaria | |
| www.geologija-revija.si (n.d.) |
Burkina Faso | |
| Econ Geol (2003) |
Canada | |
| Ingelson et al. (1989) |
| Peatfield (n.d.) +1 other reference |
| R. M. Thompson (1954) |
| Peatfield (n.d.) |
| Peatfield (n.d.) |
| Healy et al. (1990) |
| 153-155. +2 other references |
| Blackadar (1981) |
| Harris et al. (1984) |
| Cabri et al. (1985) |
| Ames et al. (TGI) |
| [www.ontariominerals.com] +2 other references |
| Royal Ontario Museum |
| Satterly +1 other reference | |
| Ramdohr (1969) | |
| Satterly +1 other reference | |
| Can Min (1971) | |
| Sixteenth Annual Report of The Bureau ... +2 other references | |
| Satterly +1 other reference | |
| the Canadian Mineralogist V 11 Part 1 ... | |
| Sabina | |
| Sorrell (n.d.) | |
| Sabina (2000) | |
| Reiner Mielke 2014 |
| Sabina (1974) | |
| Mineral. Deposita 42 (2007) |
| Rich et al. (1977) |
Chile | |
| Cook (1979) |
| A. Moesta +3 other references | |
China | |
| He Zhang et al. (2018) |
| Genwen Chen et al. (2008) |
| Jiarong Pan and Yangzhong Yu (2013) |
| Weining Zhou (1994) |
| Zhenyuan Liu (1990) |
| Weining Zhou (1994) |
| Weining Zhou (1994) |
| Weining Zhou (1994) |
| Yi Li and Youbin Liang (1991) | |
| Weining Zhou (1994) +1 other reference |
| Econ Geol (1994) |
| Dequan Zhang (1993) +1 other reference |
| Yan Liu et al. (2011) |
| Mei Zhang et al. (2011) |
| Qian Zhang et al. (2002) +2 other references | |
| Zhicheng Lu et al. (2002) |
| Gui He and Xipeng Hu (2009) |
| Xiaogang Wang et al. (2010) |
| Huang et al. (2019) |
| Yongming Guo et al. (2007) |
| Huanbin Song et al. (2008) |
Czech Republic | |
| Šrein |
| Pažout et al. (2019) |
| Litochleb | |
| Litochleb J. et al. (Mine 19) |
| [Lapis 1995 |
| Škácha et al. (2012) | |
| Dolníček et al. (2023) | |
| Jiří Zachariáš (2017) | |
| Ettler et al. (2009) |
| Litochleb |
| Sejkora et al. (2022) |
| Ondruš et al. (2003) |
| Scharm +7 other references |
| HAK (1962) |
| Kříbek et al. (2009) |
Ethiopia | |
| Cook et al. (2000) |
Finland | |
| Kopperoinen |
| Kojonen et al. (1993) |
| Kojonen Kari 1989. The early ... |
| Makkonen |
| Kojonen +1 other reference |
France | |
| ... |
| Boisard (1872) +1 other reference |
| De Ascençao Guedes et al. (2000) |
| R.PIERROT et al. (1973) |
| Wittern (1997) |
| P&T N°23-24 et al. (Haut-Rhin) |
| Wittern +1 other reference |
| This mine worked the same vein as Gabe ... +2 other references | |
| Picot et al. (1978) |
| Wittern et al. (Cologne) |
| Brousse (1982) |
| Thiery et al. (2020) |
| Picot et al. (1977) |
Georgia | |
| Ramaz Migineishvili (2005) |
Germany | |
| Walenta (1992) |
| Walenta (1992) |
| Klaproth (1797) +1 other reference |
| Lapis 1987 (7/8) |
| Weiß (1990) |
| Weiß (1990) |
| Klaproth (1802) |
| Own collection | |
| Weiß (1990) | |
| Weiß (1990) | |
| Eigenfunde/Halde Manfred Gross | |
| Wittern (2001) |
| Hajek (2010) |
| King (n.d.) | |
| Wittern (2001) |
Greece | |
| Meixner et al. (1982) |
Greenland | |
| Petersen (2001) |
| Karup-Møller et al. (1974) +1 other reference |
India | |
| Höller et al. (1997) +1 other reference |
| Parihar et al. (2016, October) |
Italy | |
| · Maletto et al. (2016) |
| Exel (1987) |
| Exel (1987) +6 other references |
| Exel (1987) | |
| Exel (1987) | |
| Exel (1987) |
| Exel (1987) | |
| Exel (1987) | |
| Exel (1987) | |
Japan | |
| Ishibashi (1956) +2 other references |
Kazakhstan | |
| - (2005) |
| |
Madagascar | |
| Behier (1960) |
Mexico | |
| Panczner (1987) |
Morocco | |
| Barral et al. (2009) |
| Praszkier (2010) +1 other reference |
| Nshimiyimana et al. (2018) |
Namibia | |
| von Bezing (2007) |
| Joy Desor specimen. Analyzed by EDS. ... |
Norway | |
| Kullerud et al. (2016) |
| Brünnich (1777) |
| Gatedal (n.d.) |
| Neumann (1944) +1 other reference | |
| Ramdohr (1938) |
| Cook et al. (1998) |
| Saager (1967) |
| Geological Survey of Norway. The Ore ... +1 other reference | |
| Geological Survey of Norway. The Ore ... |
| Geological Survey of Norway. The Ore ... |
| Jøsang (1964) | |
| Geological Survey of Norway. The Ore ... |
| Jøsang (1964) | |
| Jøsang (1964) | |
Poland | |
| Mederski et al. (2020) |
Russia | |
| www.igem.ru (2001) +1 other reference |
| Tolstykh et al. (2017) |
| Kovalev et al. (2023) |
| Kalinin +3 other references |
| American Mineralogist |
| Goryachev et al. (2011) |
Slovakia | |
| Hak J. & Losert J. |
| Ďuďa (1993) |
| Koděra (1986) |
| Koděra (1986) |
| Pauliš P. |
| Grecula P. ed. (1995) | |
| Koděra (1986) | |
| Koděra (1986) | |
| Koděra (1986) |
| Duda et. all. |
| Koděra (1986) | |
South Africa | |
| Anthony et al. (1990) |
| Cairncross et al. (1995) | |
Spain | |
| Frias +2 other references |
| Calvo | |
| Martínez Frías et al. (1992) | |
| Mineralogical Record (3) |
| Jordi Fabre +1 other reference | |
Sweden | |
| |
| Grensman et al. (2001) +1 other reference |
| Öhman et al. (2000) | |
| Tiu (2019) +1 other reference | |
| |
| Jasinski (1983) |
| Canadian Mineralogist (1984) | |
| |
| NJMMh 1982 |
| Can Min (1994) +1 other reference |
| Dobbe et al. (1994) | |
| Gatedal (n.d.) |
| Lorin et al. (2009) |
| Rincon (2022) | |
| Pavel.M. Kartashov (n.d.) | |
| Gatedal (n.d.) |
| Kieft et al. (1987) |
Switzerland | |
| Stalder et al. (1998) |
Tajikistan | |
| Pavel.M. Kartashov (n.d.) |
| Badalov et al. (1975) |
| Moralev et al. (1999) |
| Badalov et al. (1975) |
USA | |
| William C. van Laer |
| Forbes et al. (1991) |
| Anthony et al. (1995) |
| Schrader (1917) +1 other reference |
| Schrader (1917) +1 other reference |
| Eckel et al. (1997) |
| Eckel et al. (1997) |
| Eckel et al. (1997) |
| Eckel et al. (1997) |
| Heinrich et al. (2004) |
| Rocks & Minerals |
| Castor et al. (2004) |
| Castor et al. (2004) | |
| Castor et al. (2004) |
| Northrop et al. (1996) |
| Northrop et al. (1996) | |
| Bullock (1981) |
| Lasmanis (1995) |
| Cannon (1975) +2 other references |
| Adams (1996) |
Uzbekistan | |
| Kovalenker et al. (1995) |
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St Andreasberg, Braunlage, Goslar District, Lower Saxony, Germany