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Poyarkovite

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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:
for Vlakimir Erastovich Poyarkov (1907–1975), Institute of Mineral Resources, Alma-Ata, Kyrgyzstan, "well-known investigator of mercury and antimony deposits"
This page provides mineralogical data about Poyarkovite.


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Classification of PoyarkoviteHide

Approved
3.DD.10

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
8.5.4

8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
5 : Halides of Zn and Hg

Physical Properties of PoyarkoviteHide

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 PoyarkoviteHide

Type:
Anisotropic
Anisotropism:
Strong - color varying from sky-blue to brown-red or from violet to gray
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

Chemical Properties of PoyarkoviteHide

Formula:
(Hg2+2)3Cl2O2
IMA Formula:
Hg3OCl

Crystallography of PoyarkoviteHide

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°
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)

Type Occurrence of PoyarkoviteHide

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 depposits
Associated Minerals at Type Locality:

Synonyms of PoyarkoviteHide

Other Language Names for PoyarkoviteHide

Common AssociatesHide

Calomel(Hg2)2+Cl2
Eglestonite(Hg2+2)3OCl3(OH)
MercuryHg
MontroyditeHgO
Terlinguaite(Hg2+2)Hg2+2Cl2O2

Related Minerals - Nickel-Strunz GroupingHide

3.DD.05Eglestonite(Hg2+2)3OCl3(OH)Iso. m3m (4/m 3 2/m) : Ia3d
3.DD.05Kadyrelite(Hg2+2)3OBr3(OH)Iso.
3.DD.15Hanawaltite(Hg2+2)3Hg2+(Cl,OH)2O3Orth. mmm (2/m 2/m 2/m)
3.DD.20Terlinguaite(Hg2+2)Hg2+2Cl2O2Mon. 2/m : B2/m
3.DD.25PinchiteHg2+5Cl2O4Orth.
3.DD.30Gianellaite[(NHg2)2](SO4)(H2O)xIso. 4 3m : F4 3m
3.DD.30Mosesite(Hg2N)(Cl,SO4,MoO4) · H2OIso.
3.DD.35Kleinite(Hg2N)(Cl,SO4) · nH2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
3.DD.40Tedhadleyite(Hg+2)5Hg2+I2(Cl,Br)2O4Tric.
3.DD.45Vasilyevite(Hg+2)10I3Br2Cl(CO3)O6Tric. 1 : P1
3.DD.50Aurivilliusite(Hg+2)0.5Hg2+(I,Br,Cl)OMon. 2/m : B2/b
3.DD.55TerlinguacreekiteHg2+3Cl2O2Orth.
3.DD.60Kelyanite(Hg+2)6Sb3+BrCl2O6Mon.
3.DD.65ComancheiteHg2+55N3–24(NH2,OH)4(Cl,Br)34Orth.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

8.5.1SimonkolleiteZn5Cl2(OH)8 · H2OTrig. 3m (3 2/m) : P3m1
8.5.2Calomel(Hg2)2+Cl2Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
8.5.3Terlinguaite(Hg2+2)Hg2+2Cl2O2Mon. 2/m : B2/m
8.5.5PinchiteHg2+5Cl2O4Orth.
8.5.6Eglestonite(Hg2+2)3OCl3(OH)Iso. m3m (4/m 3 2/m) : Ia3d
8.5.7Kadyrelite(Hg2+2)3OBr3(OH)Iso.
8.5.8ComancheiteHg2+55N3–24(NH2,OH)4(Cl,Br)34Orth.
8.5.9Kuzminite(Hg2+2)(Br,Cl)2Tet.
8.5.10Moschelite(Hg2+2)I2Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
8.5.11Tocornalite(Ag,Hg)I

Other InformationHide

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:
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.

References for PoyarkoviteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Vasil'yev, V. I., Lavrent'yev, Y. G., & Pal'chik, N. A. (1982). Poyarkovite, Hg3ClO, a new natural mercury oxychloride. International Geology Review, 24(3), 363-366.
Fleischer M, Chao G Y, Mandarino J A (1982) New mineral names. American Mineralogist 67: 860.
Pervukhina, N. V., & Romanenko, G. V. (1999). New Data on the Mercury Oxide-chloride Mineral Poyarkovite: the Second Find, and Crystal. Structure Determination. Canadian Mineralogist 37:119-126

Internet Links for PoyarkoviteHide

Localities for PoyarkoviteHide

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

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Germany
 
  • Rhineland-Palatinate
    • Palatinate
      • Kirchheimbolanden
        • Mörsfeld
H. Hensel and U. Kolitsch (2005): New mineral finds from Palatine mercury deposits (Part 3): Poyarkovite from Mörsfeld. Aufschluss 56, 141-146. (in German)
Kyrgyzstan
 
  • Osh Oblast
    • Alai Range (Alay Range)
[Lapis 1993:11 p11-24]
      • Fergana Valley
[ZVMO,(1981) 110, 501-506; Lapis 11:11-24]; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Vasil'yev, V. I., Lavrent'yev, Y. G., & Pal'chik, N. A. (1982). Poyarkovite, Hg3CIO, a new natural mercury oxychloride. International Geology Review, 24(3), 363-366.
Russia
 
  • Eastern-Siberian Region
    • Tuva Republic
      • Pii-Khem District
        • Uyuk Range
Canadian Mineralogist Feb. 1999; Pervukhina, N. V., Vasil’ev, V. I., Borisov, S. V., Magarill, S. A., & Naumov, D. Y. (2003). The crystal structure of a polymorph of Hg2+ 3S2Br1. 0Cl0. 5I0. 5. The Canadian Mineralogist, 41(6), 1445-1453.
          • Oorash-Khem River Valley
Pervukhina, N. V., Vasil’ev, V. I., Borisov, S. V., Magarill, S. A., & Naumov, D. Y. (2003). The crystal structure of a polymorph of Hg2+ 3S2Br1. 0Cl0. 5I0. 5. The Canadian Mineralogist, 41(6), 1445-1453.
Mineral and/or Locality  
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