Niksergievite Mineral Data

[On-Line Catalogue] [On-Line Auctions] [eBay] [Contact Us] [Policies]
We specialize in fine European and Asian Mineral Specimens
Heliodor is based in Prague, Czech Republic

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 % 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

Empirical Formula:

Ba_1.27Ca_0.65K_0.02Al_3.49Si_3.42Mg_0.07Fe²⁺_0.02O₁₀(CO₃)_0.99·0.2(H₂O)(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:

MonoclinicSpace Group: C 2/m, C 2, or Cm

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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

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:

PE_{Niksergievite}= 102.34 barns/electron
U=PE_{Niksergievite} 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 - Google Images
4 - Google Scholar
5 - MinDAT
6 - MinMax(Deutsch)
7 - MinMax(English)
8 - Mineralienatlas (Deutsch)
9 - QUT Mineral Atlas
10 - Ruff.Info

Search for Niksergievite using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Niksergievite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Niksergievite Mineral Data :

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 Español

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: