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Pautovite

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Russian mineralogist Leonid Anatol'evich Pautov.
Formula:
CsFe2S3
System:
Orthorhombic
Colour:
Dark steel-grey
Name:
to honor Leonid A. Pautov (b. 1958), in recognition of his studies of minerals by physical methods
An unusual caesium sulphide mineral that occurs as small elongated black aggregates. The only currently known mineral combining Cs and S. The second Cs-Fe mineral after caesiumpharmacosiderite.

Classification of Pautovite

Approved
Approval Year:
2004
2.FB.20

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
F : Sulfides of arsenic, alkalies; sulfides with halide, oxide, hydroxide, H2O
B : With alkalies (without Cl, etc.)
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http://www.mindat.org/min-27200.html
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Type Occurrence of Pautovite

General Appearance of Type Material:
crude prismatic to acicular crystals up to 120 microns in length and 15 microns thick, in subparallel overgrowths on belovite-(Ce)
Geological Setting of Type Material:
hydrothermal, in peralkaline pegmatite

Physical Properties of Pautovite

Metallic
Diaphaneity (Transparency):
Opaque
Comment:
strong
Colour:
Dark steel-grey
Comment:
blackens in air
Streak:
could not be measured
Comment:
could not be measured
Tenacity:
Flexible
Cleavage:
Perfect
{110}
Fracture:
Splintery
Density:
3.85 g/cm3 (Calculated)
Comment:
couldn't be measured

Crystallography of Pautovite

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Cmcm
Cell Parameters:
a = 9.477Å, b = 11.245Å, c = 5.485Å
Ratio:
a:b:c = 0.843 : 1 : 0.488
Unit Cell Volume:
V 584.5 ų
Z:
4
Twinning:
not observed
X-Ray Powder Diffraction Data:
d-spacingIntensity
4.69 (30)
4.28 (20)
2.981(100)
2.723 (40)
2.003 (30)
1.910 (60)
1.785 (30)
1.565 (40)

Optical Data of Pautovite

Type:
Anisotropic
Anisotropism:
strong, pale brownish
Bireflectance:
strong
Reflectivity:
470nmR1=14.0%R2=24.6%
546nmR1=14.7%R2=23.5%
589nmR1=15.2%R2=24.6%
650nmR1=16.0%R2=27.1%

Reflectance graph
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 27.1%.
R1 shown in black, R2 shown in red
Internal Reflections:
not observed
Pleochroism:
Visible
Comments:
greyish white to grey with a slight pinkish tint

Chemical Properties of Pautovite

Formula:
CsFe2S3
All elements listed in formula:
Analytical Data:
Electron microprobe, wt.%; empirical formula basis: 6 atoms pfu
K 0.21
Rb 1.31
Cs 36.12
Tl 0.50,
Fe 33.80
S 28.85

total 100.79 
Empirical Formula:
(Cs0.91Rb0.05K0.02Tl0.01)0.99Fe2.02S2.99

Relationship of Pautovite to other Species

2.FB.05CaswellsilveriteNaCrS2
2.FB.05SchöllhorniteNa0.3CrS2 · H2O
2.FB.05CronusiteCa0.2CrS2 · 2 H2O
2.FB.10ChvilevaiteNa(Cu,Fe,Zn)2S4
2.FB.15Orickite2CuFeS2 · H2O
2.FB.20RasvumiteKFe2S3
2.FB.25ColimaiteK3VS4

Other Names for Pautovite

Name in Other Languages:
German:Pautovit
Simplified Chinese:硫铁铯矿
Traditional Chinese:硫鐵銫礦

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.

References for Pautovite

Reference List:
Pekov, I.V., A.A. Agakhanov, M.M. Boldyreva, and V.G. Grishin (2005) Pautovite, CsFe2S3, a new mineral species from the Lovozero alkaline complex, Kola Peninsula, Russia
Canadian Mineralogist: 43: 965-972.

Internet Links for Pautovite

Localities for Pautovite

(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Russia (TL)
 
  • Northern Region
    • Murmanskaja Oblast'
      • Kola Peninsula
        • Lovozero Massif
          • Kedykverpakhk Mt
            • Karnasurt underground mine
              • Kedyk area
Mineralogical Record: 36(4): 397-416.
Mineral and/or Locality  
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