Poyarkovite
A valid IMA mineral species
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About Poyarkovite
Formula:
[Hg2]2+3Cl2O2
Colour:
Cherry red, darkening to dark red, purple
Lustre:
Adamantine, Vitreous
Hardness:
2 - 2½
Specific Gravity:
9.50 - 9.80
Crystal System:
Monoclinic
Name:
Named in honor of Vladimir Erastovich Poyarkov (Владимир Эрастович Поярков) (1907–1975), Institute of Mineral Resources, Alma-Ata, Kyrgyzstan, "well-known investigator of mercury and antimony deposits", and discoverer of the Khaidarkan deposit.
This page provides mineralogical data about Poyarkovite.
Unique Identifiers
Mindat ID:
3276
Long-form identifier:
mindat:1:1:3276:2
GUID
(UUID V4):
(UUID V4):
7d1c3ebe-3c72-4841-b94d-83346438c61c
IMA Classification of Poyarkovite
Approved
IMA Formula:
Hg3OCl
First published:
1981
Classification of Poyarkovite
3.DD.10
3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
D : With Hg
3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
D : With Hg
10.5.2.1
10 : OXYHALIDES AND HYDROXYHALIDES
5 : Am(O,OH)pXq
10 : OXYHALIDES AND HYDROXYHALIDES
5 : Am(O,OH)pXq
8.5.4
8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
5 : Halides of Zn and Hg
8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
5 : Halides of Zn and Hg
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 |
---|---|---|
Poy | 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 Poyarkovite
Adamantine, Vitreous
Transparency:
Translucent
Colour:
Cherry red, darkening to dark red, purple
Streak:
Cherry to cinnabar red
Hardness:
2 - 2½ on Mohs scale
Hardness:
VHN20=188 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven, Conchoidal
Density:
9.50 - 9.80 g/cm3 (Measured) 9.64 g/cm3 (Calculated)
Optical Data of Poyarkovite
Anisotropism:
Strong - color varying from sky-blue to brown-red or from violet to gray
Reflectivity:
Wavelength | R1 | R2 |
---|---|---|
440nm | 25.0% | 31.0% |
460nm | 24.5% | 31.0% |
480nm | 22.5% | 31.0% |
500nm | 22.5% | 30.0% |
520nm | 22.2% | 29.2% |
540nm | 22.0% | 28.4% |
560nm | 21.6% | 27.2% |
580nm | 20.9% | 25.5% |
600nm | 20.0% | 23.5% |
620nm | 18.5% | 22.1% |
640nm | 17.0% | 20.7% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 31.0%.
R1 shown in black, R2 shown in red
Colour in reflected light:
White with a weak bluish gray tint
Internal Reflections:
Purple, purple-red or crimson-red internal reflections are common in air
Pleochroism:
Weak
Comments:
RI n above 2.0
Chemistry of Poyarkovite
Mindat Formula:
[Hg2]2+3Cl2O2
Elements listed:
Crystallography of Poyarkovite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 18.82 Å, b = 9.02 Å, c = 16.79 Å
β = 112.4°
β = 112.4°
Ratio:
a:b:c = 2.086 : 1 : 1.861
Unit Cell V:
2,635.15 ų (Calculated from Unit Cell)
Z:
24
Twinning:
twins
Comment:
Also see Pervukhina, N. V., & Romanenko, G. V. (1999)
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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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) |
---|---|---|---|---|---|---|---|
0005596 | Poyarkovite | Vasil'ev V I, Pervukhina N V, Romanenko G V, Magarill S A, Borisov S V (1999) New data on the mercury oxide-chloride mineral poyarkovite: The second find, and crystal-structure determination The Canadian Mineralogist 37 119-126 | 1999 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.83 Å | (100) |
2.74 Å | (80) |
1.799 Å | (65) |
2.60 Å | (60) |
3.09 Å | (50) |
2.96 Å | (40) |
1.883 Å | (40) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
47g : [Halogen-bearing surface weathering minerals] | |
47h : [Near-surface oxidized, dehydrated minerals] |
Type Occurrence of Poyarkovite
General Appearance of Type Material:
Grains.
Place of Conservation of Type Material:
Central Siberian Geological Museum, Siberian Branch, Acad. Sci.
Geological Setting of Type Material:
Oxidation zone of cinnabar deposits.
Associated Minerals at Type Locality:
Reference:
Vasil'yev, V.I., Lavrent'yev, Y.G., Pal'chik, N.A. (1981) Poyarkovite Hg3ClO, a new natural mercury oxyhalide. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 110(4): 501-506.
Synonyms of Poyarkovite
Other Language Names for Poyarkovite
Related Minerals - Strunz-mindat Grouping
3.DD. | Mikecoxite | [CHg4]OCl2 |
3.DD.05 | Eglestonite | [Hg2]2+3OCl3(OH) |
3.DD.05 | Kadyrelite | [Hg2]2+3OBr3(OH) |
3.DD.15 | Hanawaltite | [Hg2]2+3Hg2+(Cl,OH)2O3 |
3.DD.20 | Terlinguaite | [Hg3]4+Hg2+Cl2O2 |
3.DD.25 | Pinchite | Hg2+5Cl2O4 |
3.DD.30 | Gianellaite | [(Hg2N)2](SO4)(H2O)x |
3.DD.30 | Mosesite | (Hg2N)(Cl,SO4,MoO4) · H2O |
3.DD.35 | Kleinite | (Hg2N)(Cl,SO4) · nH2O |
3.DD.40 | Tedhadleyite | [Hg2]2+5Hg2+I2(Cl,Br)2O4 |
3.DD.45 | Vasilyevite | [Hg2]2+10I3Br2Cl[CO3]O6 |
3.DD.50 | Aurivilliusite | [Hg2]2+Hg2+2(I,Br,Cl)2O2 |
3.DD.55 | Terlinguacreekite | Hg2+3Cl2O2 |
3.DD.60 | Kelyanite | [Hg]2+6Sb3+BrCl2O6 |
3.DD.65 | Comancheite | Hg2+55N3-24(NH2,OH)4(Cl,Br)34 |
3.DD.70 | Gaildunningite | Hg2+3[NHg2+2]18(Cl,I,OH,Br,S)24 |
Other Information
Notes:
The mineral is instantly blackened by KOH, decomposed by HNO3, does not react with HCl. When heated in a closed tube, turns brown, red, then yellow (formation of montroydite) and finally sublimes completely as Hg + calomel.
Special Storage/
Display Requirements:
Display Requirements:
It is unstable when extracted from a primary place of "conservation", and it eventually transforms completely to an X-ray-amorphous substance
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 Poyarkovite
mindat.org URL:
https://www.mindat.org/min-3276.html
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References for Poyarkovite
Localities for Poyarkovite
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).
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.
All localities listed without proper references should be considered as questionable.
Germany | |
| H. Hensel and U. Kolitsch (2005) |
Kyrgyzstan | |
| Kolesar et al. (1993) |
ZVMO (1981) +3 other references | |
Russia | |
| Canadian Mineralogist Feb. 1999 +1 other reference |
| Pervukhina et al. (2003) |
Quick NavTopAbout PoyarkoviteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesStrunz-MindatOther InformationInternet Links References Localities Locality List
Khaidarkan Sb-Hg deposit, Kadamjay District, Batken Region, Kyrgyzstan