Niksergievite Mineral Data
General Niksergievite Information
Chemical Formula:
[Ba,Ca)2(Al,Si)7O10(CO3)(OH)6•nH2O
Composition:
Molecular Weight = 722.73 gm
Potassium 0.11 % K 0.13 % K2 O
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 % Al2 O3
Iron 0.15 % Fe 0.20 % FeO
Silicon 13.29 % Si 28.43 % SiO2
Hydrogen 0.92 % H 8.23 % H2 O
Carbon 1.65 % C 6.03 % CO2
Oxygen 42.88 % O
______ ______
100.00 % 100.01 % = TOTAL OXIDE
Empirical Formula:
Ba1.27 Ca0.65 K0.02 Al3.49 Si3.42 Mg0.07 Fe2+ 0.02 O10 (CO3 )0.99 �0.2(H2 O)(OH)6.2
Environment:
Found in intensively metamorphosed dolomites and limestones enriched in galena, sphalerite and pyrite. Surite series.
IMA Status:
Approved IMA 2002 (Dana # Added)
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.
Name Origin:
Named in honor of Prof. Nikolai Grigorievich Sergiev (1901-1960), a Soviet geologist, for his contributions to the geology of Kazakhstan.
Synonym:
IMA2002-036
Niksergievite Image
Images:
Niksergievite
Comments: Pale blue to colorless lamellar fragment of niksergievite.
Location: Tekeli mine, Karatau, Kazakhstan.
Scale: See Image.
© Rruff Database
Niksergievite Crystallography
Axial Ratios:
a:b:c =0.5758:1:1.7984
Cell Dimensions:
a = 5.176, b = 8.989, c = 16.166, Z = 2; beta = 96.44° V = 747.41 Den(Calc)= 3.21
Crystal System:
Monoclinic Space Group: C 2/m, C 2, or Cm
X Ray Diffraction:
By Intensity(I/Io ): 2.585(1)(130,2 01,1 31), 2.23(0.9)(1 34,220 ), 4.49(0.9)(020 ),
2.069(0.8)(043 )1.692(0.6)(3 11,1 51,240)3.68(0.6)(014,1 13 ), 16.1(0.4)(001 ),
Physical Properties of Niksergievite
Cleavage:
{001} Perfect
Color:
Light greenish white.
Density:
3.16
Diaphaneity:
Translucent
Fracture:
Brittle - Generally displayed by glasses and most non-metallic minerals.
Habit:
Platy - Sheet forms (e.g. micas).
Habit:
Rosette - Bundled tabular aggregates resembling rose flower petals.
Hardness:
1-1.5 - Talc or a little harder
Luster:
Pearly
Streak:
white
Optical Properties of Niksergievite
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
Optical Data:
Biaxial (-), a=1.58, b=1.625, g=1.625, bire=0.0450
Calculated Properties of Niksergievite
Electron Density:
Bulk Density (Electron Density)=3.03 gm/cc note: Specific Gravity of Niksergievite =3.16 gm/cc.
Fermion Index:
Fermion Index = 0.04 Boson Index = 0.96
Photoelectric:
PENiksergievite = 102.34 barns/electronU=PENiksergievite x r electron = 310.19 barns/cc.
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
Dana Class:
71.02.04.03 (71) Phyllosilicate Sheets of Six-Membered Rings
(71.02) with 2:1 Layers
(71.02.04) Surite group
71.02.04.01 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
71.02.04.02 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
71.02.04.03 Niksergievite ! [Ba,Ca)2(Al,Si)7O10(CO3)(OH)6•nH2O C 2/m, C 2, or Cm Mono
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
References:
NAME( AmMin, v90, no7, p1163) PHYS. PROP.(AmMin, v90, no7, p1163) OPTIC PROP.(AmMin, v90, no7, p1163)
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
Search for Niksergievite using:
[AOL ]
[Bing ]
[Dog Pile ]
[GeoScienceWorld ]
[HotBot ]
[Ixquick ]
[Lycos ]
[MAMMA ]
[Scirus ]
[Teoma ]
[WebCrawler ]
[Wikipedia ]
[YAHOO ]
Visit our Advertisers for Niksergievite :
Ask about Niksergievite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in
Espa�ol
Print or Cut-and-Paste your Niksergievite Specimen Label here :
Niksergievite
[Ba,Ca)2(Al,Si)7O10(CO3)(OH)6•nH2O
Dana No: 71.02.04.03 Strunz No: 09.EC.75
Locality:
Notes:
Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.