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General Kainite Information

Help on Chemical  Formula: Chemical Formula: MgSO4·KCl·3(H2O)
Help on Composition: Composition: Molecular Weight = 248.97 gm
   Potassium  15.70 %  K    18.92 % K2O
   Magnesium   9.76 %  Mg   16.19 % MgO
   Hydrogen    2.43 %  H    21.71 % H2O
   Sulfur     12.88 %  S    32.16 % SO3
   Chlorine   14.24 %  Cl   14.24 % Cl
                -   %  Cl   -3.21 % -O=Cl2
   Oxygen     44.98 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg(SO4)KCl·3(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1865
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek kainos, meaning "contemporary."
Help on Synonym: Synonym: ICSD 26003
  PDF 25-660
 

Kainite Image

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Kainite   Szaibelyite

Comments: pale violet granular kainite intermixed with white ascharite (szaibelyite).
Location: Havesa, Empelde, Hannover, Niedersachsen, Germany. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Kainite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.215:1:0.5871
Help on Cell Dimensions: Cell Dimensions: a = 19.72, b = 16.23, c = 9.53, Z = 16; beta = 94.92° V = 3,038.89 Den(Calc)= 2.18
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.372(1), 3.08(0.86), 7.771(0.83),
Help on Forms: Forms:

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Forms: [ 0 1 0] [ 4 2 1] [ 4 2 1] [ 1 0 0] [ 0 0 1]

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Click Here for Large Kainite Structure Window Crystal Structure:

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Robinson P D , Fang J H , Ohya Y , American Mineralogist , 57 (1972) p.1325-1332, The crystal structure of kainite

 

Physical Properties of Kainite

Help on Cleavage: Cleavage: [001] Good
Help on Color: Color: Blue, Colorless, Violet, Gray, Gray blue.
Help on Density: Density: 2.1
Help on Diaphaniety: Diaphaniety: Transparent to Translucent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous - Greasy
Help on Streak: Streak: white
 

Optical Properties of Kainite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.019 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.055 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2317,KPDmeas= 0.2405,KC= 0.2452
Help on Optical Data: Optical Data: Biaxial (-), a=1.494, b=1.505, g=1.516, bire=0.0220, 2V(Calc)=88, 2V(Meas)=90.
 

Calculated Properties of Kainite

Help on Electron Density: Electron Density:

relectron=2.13 gm/cc
note: rKainite =2.10 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.01096
Boson Index = 0.98904
Help on Photoelectric: Photoelectric:

PEKainite = 3.49 barns/electron
U=PEKainite x relectron= 7.41 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 229.33 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Kainite - barely detectable

 

Kainite Classification

Help on  Dana Class: Dana Class: 31.7.1.1 (31)Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.7)where (A+ B++)2 (XO4) Zq·x(H2O)
  (31.7.1)Dana Group
 
31.7.1.1 Kainite MgSO4·KCl·3(H2O) C 2/m 2/m
Help on  Strunz Class: Strunz Class: VI/D.18-10 VI - Sulfates,Chromates,Molybdates and Tungstates
  VI/D - Water-bearing sulfates with unfamiliar anions. cations of medium and very big size
  VI/D.18 - Kainite - Natrochalcite series
 
VI/D.18-10 Kainite MgSO4·KCl·3(H2O) C 2/m 2/m
 
VI/D.18-20 Uklonskovite NaMg(SO4)F·2(H2O) P 21/m 2/m
 
VI/D.18-30 Natrochalcite NaCu2(SO4)2(OH)·(H2O) I2/m 2/m
 
VI/D.18-40 Vonbezingite Ca6Cu3(SO4)3(OH)12·2(H2O) P 21/c 2/m
 

Other Kainite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Kainite :
1 -Am. Min. Crystal Structure Database 2 - Applied Mineralogy 3 -Athena 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 - WWW-MINCRYST 14 -École des Mines de Paris

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Kainite

MgSO4·KCl·3(H2O)
Dana No: 31.7.1.1 Strunz No: VI/D.18-10
Locality:

 

Notes:

 

 
   
 
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