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Chursinite

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Lyudmila Alekseevna Chursina
Formula:
(Hg+2)0.5Hg2+(AsO4)
Colour:
Yellow-brown to orange-brown
Lustre:
Adamantine
Hardness:
3
Specific Gravity:
9.06 (Calculated)
Crystal System:
Monoclinic
Name:
In honour of the Russian theatre and film actress Lyudmila Alekseevna Chursina (1941– ).
Second mercury arsenate mineral after kuznetsovite.

Weil (2004) reports chursinite as the α-(Hg2)3(AsO4)3. In the crystal structure of the synthetic alpha form, 3/4 of oxygen atoms of the arsenate group are linked to three different Hg-Hg pairs, to form puckered layers. Hg coordination is tetrahedral. Hg2 pairs are in dumbbell configuration. Both α and β forms (synthetic, light yellow) have the same space group.


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Classification of ChursiniteHide

Approved
8.AD.60

8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
D : With only large cations
38.5.1.1

38 : ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
5 : Miscellaneous

Physical Properties of ChursiniteHide

Adamantine
Transparency:
Transparent
Comment:
nearly adamantine
Colour:
Yellow-brown to orange-brown
Comment:
transparent in thin fragments
Streak:
Grayish yellow
Hardness:
Hardness:
VHN100=198 - 245 - Vickers
Comment:
ca. 3
Tenacity:
Brittle
Density:
9.06 g/cm3 (Calculated)
Comment:
data for synthetic material

Optical Data of ChursiniteHide

Type:
Biaxial
RI values:
n = >2
Max Birefringence:
δ = 0.000
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Type:
Anisotropic
Anisotropism:
Dark brown to blue-gray
Reflectivity:
460; (16.1–20.4) 546; (15.8–19.7) 590; (14.5–18.5) 656nmR=18.5–22.8%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 18.5–22.8%.
Colour in reflected light:
gray with bluish tint; bluish to bluish white when tarnished
Comments:
Pale brownish yellow to light brown

Chemical Properties of ChursiniteHide

Formula:
(Hg+2)0.5Hg2+(AsO4)
IMA Formula:
Hg1+Hg2+(AsO4)

Crystallography of ChursiniteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Cell Parameters:
a = 8.71(2) Å, b = 5.08(2) Å, c = 15.66(2) Å
β = 128.27(11)°
Ratio:
a:b:c = 1.715 : 1 : 3.083
Unit Cell V:
544.00 ų (Calculated from Unit Cell)
Z:
2

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.05 (100)
2.89 (75)
2.84 (70)
2.49 (50)
2.16 (50)
1.911 (50)
1.883 (50)

Type Occurrence of ChursiniteHide

General Appearance of Type Material:
grains to 0.2 mm
Place of Conservation of Type Material:
Institute of Geology and Geophysics, Siberian Division, Academy of Sciences, Novosibirsk, no. XI-41/1; Mining Institute, St. Petersburg, Russia, no. 1678/1
Geological Setting of Type Material:
oxidized zone of Sb-As-Hg deposit
Associated Minerals at Type Locality:

Synonyms of ChursiniteHide

Other Language Names for ChursiniteHide

German:Chursinit
Spanish:Chursinita

Related Minerals - Nickel-Strunz GroupingHide

8.AD.05NahpoiteNa2HPO4Mon. 2/m : P21/m
8.AD.10MonetiteCa(HPO4)Tric. 1
8.AD.10WeiliteCa(HAsO4)Tric. 1 : P1
8.AD.10ŠvenekiteCa(H2AsO4)2Tric. 1 : P1
8.AD.15Archerite(K,NH4)(H2PO4)Tet. 4 2m : I4 2d
8.AD.15Biphosphammite(NH4,K)(H2PO4)Tet. 4 2 2 : I41 2 2
8.AD.20Phosphammite(NH4)2(HPO4)Mon. 2/m : P21/b
8.AD.25BuchwalditeNaCa(PO4)Orth. mm2 : Pmn21
8.AD.30SchultenitePb(HAsO4)Mon. 2/m : P2/b
8.AD.35Chernovite-(Y)Y(AsO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
8.AD.35DreyeriteBi(VO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
8.AD.35Wakefieldite-(Ce)Ce(VO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
8.AD.35Wakefieldite-(Y)Y(VO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
8.AD.35Xenotime-(Y)Y(PO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
8.AD.35PretuliteSc(PO4)Tet.
8.AD.35Xenotime-(Yb)Yb(PO4)Tet.
8.AD.35Wakefieldite-(La)La(VO4)Tet. 4/mmm (4/m 2/m 2/m) : I41/amd
8.AD.40PucheriteBi(VO4)Orth. mmm (2/m 2/m 2/m)
8.AD.45XimengiteBi(PO4)Trig.
8.AD.50Gasparite-(Ce)Ce(AsO4)
8.AD.50Monazite-(Ce)Ce(PO4)Mon. 2/m : P21/b
8.AD.50Monazite-(La)La(PO4)
8.AD.50Monazite-(Nd)Nd(PO4)
8.AD.50RooseveltiteBi(AsO4)Mon. 2/m
8.AD.50CheraliteCaTh(PO4)2Mon. 2/m
8.AD.50Monazite-(Sm)Sm(PO4)Mon. 2/m : P21/m
8.AD.50UM2005-35-VO:CaFePSiTh(Th,Ca)(VO4,SiO4,PO4)
8.AD.55TetrarooseveltiteBi(AsO4)Tet.
8.AD.65ClinobisvaniteBi(VO4)Mon. 2/m

Other InformationHide

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 ChursiniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Vasil’ev, V.I., Y.G. Lavrent’ev, Pal’chik, N.A. (1984): Chursinite,
(Hg2)3(AsO4)3, a new natural mercury arsenate. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 113: 341–347 (in Russian).
American Mineralogist: 70: 871.
Acta Crystallographica: B29: 1666-1669.
Kamenar, B., Kaitner, B. (1973): The Crystal Structure of Mercury(I) Orthoarsenate. Acta Crystallographica B: 29: 1666.
Weil, M. (2004): A Second Modification of Mercury(I) Orthoarsenate(V): Preparation and Crystal Structure of β-(Hg2)3(AsO4)2. Zeitschrift für Naturforschung B: 59b: 859-864.
Anthony, J.W., Bideaux, R.A., Bladh, K.W., Nichols, M.C., Eds. Handbook of Mineralogy, Mineralogical Society of America, Chantilly, VA 20151-1110, USA. http://www.handbookofmineralogy.org/ (2016)

Internet Links for ChursiniteHide

Localities for ChursiniteHide

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.
Australia
 
  • New South Wales
    • Robinson Co.
      • Cobar
Leverett, P., McKinnon, A. R., & Williams, P. A. (2005). Supergene geochemistry of the Endeavor ore body, Cobar, NSW, and relationships to other deposits in the Cobar basin. Regolith 2005–Ten Years of CRC LEME, 191-194.
Kyrgyzstan
 
  • Osh Oblast
    • Alai Range (Alay Range)
[Lapis 1993:11 p11-24]
      • Fergana Valley
[ZVMO,(1984) 113, 341-347; Lapis 11:11-24]; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Mineral and/or Locality  
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