Mineralogy Database

Takovite Mineral Data

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General Takovite Information

Help on Chemical  Formula: Chemical Formula: Ni6Al2(OH)16(CO3,OH)•4(H2O)
Help on Composition: Composition: Molecular Weight = 799.54 gm
   Aluminum   6.75 %  Al   12.75 % Al2O3
   Nickel    44.04 %  Ni   56.05 % NiO
   Hydrogen   3.06 %  H    27.32 % H2O
   Carbon     1.13 %  C     4.13 % CO2
   Oxygen    45.02 %  O
            ______        ______ 
            100.00 %      100.25 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ni6Al2(OH)16(CO3)0.75(OH)0.25•4(H2O)
Help on Environment: Environment: Metamorphosed serpentinite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1957
Help on Locality: Locality: Takovo, Serbia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Takovite Say TAKOVITE
Help on Synonym: Synonym: Eardleyite-Zn

Takovite Image

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Comments: Aqua-colored takovite on rock.
Location: Carr-Boyd Nickel Mine, Western Australia, Australia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Takovite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:7.47682
Help on Cell Dimensions: Cell Dimensions: a = 6.04, c = 45.16, Z = 3; V = 1,426.79 Den(Calc)= 2.79
Help on Crystal System: Crystal System: Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.57(1), 1.917(0.9), 2.552(0.9),2.26(0.8), 3.77(0.8), 1.708(0.7), 2.38(0.5), 2.6(0.4),

Physical Properties of Takovite

Help on Color: Color: Blue green, Yellow green.
Help on Density: Density: 2.798
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Pearly

Optical Properties of Takovite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.051 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.049 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2156,KPDmeas= 0.215,KC= 0.2266
Ncalc = 1.63
Help on Optical Data: Optical Data: Uniaxial (-), e=1.598, w=1.605, bire=0.0070.

Calculated Properties of Takovite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.81 gm/cc
note: Specific Gravity of Takovite =2.79 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0053214732
Boson Index = 0.9946785268
Help on Photoelectric: Photoelectric: PETakovite = 17.27 barns/electron
U=PETakovite x rElectron Density= 48.54 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Takovite is Not Radioactive

Takovite Classification

Help on  Dana Class: Dana Class: 16b.06.03.02 (16b)Carbonates - Hydroxyl or Halogen
  (16b.06)Dana Type
  (16b.06.03)Sjorgrenite-Hydrotalcite Group (Hydrotalcite Subgroup:Rhombohedral)
16b.06.03.01 Reevesite Ni6Fe2(CO3)(OH)16•4(H2O) R 3m 3 2/m
16b.06.03.02 Takovite Ni6Al2(OH)16(CO3,OH)•4(H2O) R 3m 3 2/m
16b.06.03.03 Comblainite Ni6Co2(CO3)(OH)16•4(H2O) R 3m 3 2/m
Help on  Strunz Class: Strunz Class: 05.DA.50 05 - CARBONATES (NITRATES)
  05.D - Carbonates with Additional Anions, with H2O
  05.DA -With medium-sized cations
05.DA.50 Desautelsite Mg6Mn2(CO3)(OH)16•4(H2O) R 3m or R 3m Trig
05.DA.50 Comblainite Ni6Co2(CO3)(OH)16•4(H2O) R 3m 3 2/m
05.DA.50 Hydrotalcite Mg6Al2(CO3)(OH)16•4(H2O) R 3m 3 2/m
05.DA.50 Pyroaurite Mg6Fe2(CO3)(OH)16•4(H2O) R 3m 3 2/m
05.DA.50 Reevesite Ni6Fe2(CO3)(OH)16•4(H2O) R 3m 3 2/m
05.DA.50 Stichtite Mg6Cr2(CO3)(OH)16•4(H2O) R 3m 3 2/m
05.DA.50 Takovite Ni6Al2(OH)16(CO3,OH)•4(H2O) R 3m 3 2/m

Other Takovite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Takovite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: 16b.06.03.02 Strunz No: 05.DA.50





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