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
IMA Classification of Poyarkovite
Approved
IMA Formula:
Hg1+3OCl
Approval year:
1980
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 for Standard |
|---|---|---|
| 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). 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:
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
Reference List:
Vasil'yev, V. I., Lavrent'yev, Yu. G., Pal'chik, N. A. (1982) Poyarkovite, Hg3CIO, a new natural mercury oxychloride. International Geology Review, 24 (3) 363-366 doi:10.1080/00206818209452414
Fleischer, Michael; Chao, George Y.; Mandarino, Joseph A. (1982) New mineral names. American Mineralogist, 67 (7-8). p.854-860. p.860
Localities for Poyarkovite
Showing 5 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.
Germany | |
| Hensel et al. (2005) |
Kyrgyzstan (TL) | |
| Vasil'yev et al. (1981) +3 other references |
| Kolesar et al. (1993) | |
Russia | |
| Canadian Mineralogist Feb. 1999 +1 other reference |
| Pervukhina et al. (2003) |
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Khaidarkan Sb-Hg deposit, Aydarken, Kadamjay District, Batken Region, Kyrgyzstan