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Niksergievite Mineral Data

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General Niksergievite Information

Help on Chemical  Formula: Chemical Formula: [Ba,Ca)2(Al,Si)7O10(CO3)(OH)6•nH2O
Help on Composition: Composition: Molecular Weight = 722.73 gm
   Potassium   0.11 %  K     0.13 % K2O
   Barium     24.13 %  Ba   26.94 % BaO
   Calcium     3.60 %  Ca    5.04 % CaO
   Magnesium   0.24 %  Mg    0.39 % MgO
   Aluminum   13.03 %  Al   24.62 % Al2O3
   Iron        0.15 %  Fe    0.20 % FeO
   Silicon    13.29 %  Si   28.43 % SiO2
   Hydrogen    0.92 %  H     8.23 % H2O
   Carbon      1.65 %  C     6.03 % CO2
   Oxygen     42.88 %  O
             ______        ______ 
             100.00 %      100.01 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ba1.27Ca0.65K0.02Al3.49Si3.42Mg0.07Fe2+0.02O10(CO3)0.99�0.2(H2O)(OH)6.2
Help on Environment: Environment: Found in intensively metamorphosed dolomites and limestones enriched in galena, sphalerite and pyrite. Surite series.
Help on IMA Status: IMA Status: Approved IMA 2002 (Dana # Added)
Help on Locality: Locality: Tekeli Pb-Zn mine (now abandoned) is located in southeast Kazakhstan, 44° N, 78° E, near the village of Tekeli. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named in honor of Prof. Nikolai Grigorievich Sergiev (1901-1960), a Soviet geologist, for his contributions to the geology of Kazakhstan.
Help on Synonym: Synonym: IMA2002-036

Niksergievite Image

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Comments: Pale blue to colorless lamellar fragment of niksergievite.
Location: Tekeli mine, Karatau, Kazakhstan. Scale: See Image.
© Rruff Database

Niksergievite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5758:1:1.7984
Help on Cell Dimensions: Cell Dimensions: a = 5.176, b = 8.989, c = 16.166, Z = 2; beta = 96.44° V = 747.41 Den(Calc)= 3.21
Help on Crystal System: Crystal System: Monoclinic Space Group: C 2/m, C 2, or Cm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.585(1)(130,201,131), 2.23(0.9)(134,220 ), 4.49(0.9)(020 ), 2.069(0.8)(043 )1.692(0.6)(311,151,240)3.68(0.6)(014,113 ), 16.1(0.4)(001 ),

Physical Properties of Niksergievite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Light greenish white.
Help on Density: Density: 3.16
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Rosette - Bundled tabular aggregates resembling rose flower petals.
Help on Hardness: Hardness: 1-1.5 - Talc or a little harder
Help on Luster: Luster: Pearly
Help on Streak: Streak: white

Optical Properties of Niksergievite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.021 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.037 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.19,KPDmeas= 0.193,KC= 0.1973
Ncalc = 1.62 - 1.63
Help on Optical Data: Optical Data: Biaxial (-), a=1.58, b=1.625, g=1.625, bire=0.0450

Calculated Properties of Niksergievite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.03 gm/cc
note: Specific Gravity of Niksergievite =3.16 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PENiksergievite = 102.34 barns/electron
U=PENiksergievite x relectron= 310.19 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 1.51 (Gamma Ray American Petroleum Institute Units)
Concentration of Niksergievite per GRapi unit = 66.34 (%)

Estimated Radioactivity from Niksergievite - barely detectable


Niksergievite Classification

Help on  Dana Class: Dana Class: (71)Phyllosilicate Sheets of Six-Membered Rings
  (71.02)with 2:1 Layers
  (71.02.04)Surite group Ferrisurite (Pb,Cu)2-3(CO3)1.5-2(OH,F)0.5-1[(Fe,Al)2Si4O10(OH)2]•n(H2O) P 21 or P 21/m Mono Surite (Pb,Cu)2-3(CO3)1.5-2(OH,F)0.5-1[(Al,Fe)2(Si,Al)4O10(OH)2]•n(H2O) P 21 ro P 21/m Mono Niksergievite! [Ba,Ca)2(Al,Si)7O10(CO3)(OH)6•nH2O C 2/m, C 2, or Cm Mono
Help on  Strunz Class: Strunz Class: 09.EC.75 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EC -Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets
09.EC.75 Ferrisurite (Pb,Cu)2-3(CO3)1.5-2(OH,F)0.5-1[(Fe,Al)2Si4O10(OH)2]•n(H2O) P 21 or P 21/m Mono
09.EC.75 Surite (Pb,Cu)2-3(CO3)1.5-2(OH,F)0.5-1[(Al,Fe)2(Si,Al)4O10(OH)2]•n(H2O) P 21 ro P 21/m Mono
09.EC.75 Niksergievite! [Ba,Ca)2(Al,Si)7O10(CO3)(OH)6•nH2O C 2/m, C 2, or Cm Mono

Other Niksergievite Information

Help on References: References: NAME( AmMin, v90, no7, p1163) PHYS. PROP.(AmMin, v90, no7, p1163) OPTIC PROP.(AmMin, v90, no7, p1163)
Help on See Also: See Also: Links to other databases for Niksergievite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 09.EC.75





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