Ikaite Mineral Data + Say IKAITE

General Ikaite Information

Help on Chemical  Formula: Chemical Formula: CaCO3·6(H2O)
Help on Composition: Composition: Molecular Weight = 208.18 gm
   Calcium   19.25 %  Ca   26.94 % CaO
   Hydrogen   5.81 %  H    51.92 % H2O
   Carbon     5.77 %  C    21.14 % CO2
   Oxygen    69.17 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca(CO3)·6(H2O)
Help on Environment: Environment: In cold, saline marine waters where the formation of calcite is inhibited. Decomposes into water and calcite above 8 deg. C.
Help on IMA Status: IMA Status: Approved IMA 1963
Help on Locality: Locality: Ika Fjord, Ivigtut, Greenland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: After its locality.
Help on Synonym: Synonym: Fundylite (calcite pseudomorphs)
  Glendonite (calcite pseudomorphs)
  ICSD 31305
  Jarrowite (calcite pseudomorphs)
  PDF 37-416
  Thinolite (calcite pseudomorphs)
 

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Ikaite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0777:1:1.339
Help on Cell Dimensions: Cell Dimensions: a = 8.87, b = 8.23, c = 11.02, Z = 4; beta = 110.2° V = 754.98 Den(Calc)= 1.83
Help on Crystal System: Crystal System: MonoclinicSpace Group: C 2/c or Cc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 5.17(1), 2.64(0.9), 2.63(0.7),2.8(0.5), 2.46(0.3), 2.61(0.3), 4.16(0.3), 5.85(0.3), 4.16(0.3),
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Forms: [ 2 2 1] [ 1 1 0] [ 1 1 0] [ 2 2 1]

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Hesse K F , Kuppers H , Suess E , Zeitschrift fur Kristallographie , 163 (1983) p.227-231, Refinement of the structure of ikaite, CaCO3*6(H2O), Locality: Bransfield Strait, Antarctica

 

Physical Properties of Ikaite

Help on Color: Color: Chalky white.
Help on Density: Density: 1.77 - 1.8, Average = 1.78
Help on Habit: Habit: Stalactitic - Shaped like pendant columns as stalactites or stalagmites (e.g. calcite).
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Luster: Luster: Earthy (Dull)
Help on Streak: Streak: white
 

Optical Properties of Ikaite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.034 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.009 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2801,KPDmeas= 0.2872,KC= 0.2777
Help on Optical Data: Optical Data: Biaxial (-), a=1.455, b=1.538, g=1.545, bire=0.0900, 2V(Calc)=30, 2V(Meas)=45. Dispersion distinct.
 

Calculated Properties of Ikaite

Help on Electron Density: Electron Density:

relectron=1.93 gm/cc
note: rIkaite =1.83 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00123
Boson Index = 0.99877
Help on Photoelectric: Photoelectric:

PEIkaite = 2.49 barns/electron
U=PEIkaite x relectron= 4.82 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Ikaite is Not Radioactive

 

Ikaite Classification

Help on  Dana Class: Dana Class: 15.1.4.1 (15)Hydrated Carbonates
  (15.1)where A+ (XO3) · x(H2O)
  (15.1.4)Dana Group
 
15.1.4.1 Ikaite CaCO3·6(H2O) C 2/c or Cc Mono
Help on  Strunz Class: Strunz Class: V/D.01-60 V - Nitrates, Carbonates and Borates
  V/D - Water-bearing carbonates without unfamiliar anions
  V/D.01 - Barringtonite - Ikaite series
 
V/D.01-10 Barringtonite MgCO3·2(H2O) P1 or P1 Tri
 
V/D.01-20 Nesquehonite Mg(HCO3)(OH)·2(H2O) P 21/n 2/m
 
V/D.01-30 Lansfordite MgCO3·5(H2O) P 21/a 2/m
 
V/D.01-40 Hellyerite NiCO3·6(H2O) C 2/c 2/m
 
V/D.01-50 Monohydrocalcite CaCO3·(H2O) P 3112 3 2
 
V/D.01-60 Ikaite CaCO3·6(H2O) C 2/c or Cc Mono
 

Other Ikaite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Ikaite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - University of Manchester - Mineral Structure 14 - WWW-MINCRYST 15 -École des Mines de Paris

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Ikaite

CaCO3·6(H2O)
Dana No: 15.1.4.1 Strunz No: V/D.01-60
Locality:

 

Notes:

 

 
   
 
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