Barringtonite Mineral Data + Say BARRINGTONITE

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General Barringtonite Information

Help on Chemical  Formula: Chemical Formula: MgCO3·2(H2O)
Help on Composition: Composition: Molecular Weight = 120.34 gm
   Magnesium  20.20 %  Mg   33.49 % MgO
   Hydrogen    3.35 %  H    29.94 % H2O
   Carbon      9.98 %  C    36.57 % CO2
   Oxygen     66.47 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg(CO3)·2(H2O)
Help on Environment: Environment: Found with nesquehonite on the surfaces of olivine basalt.
Help on IMA Status: IMA Status: Approved IMA 1965
Help on Locality: Locality: Barrington Tops, NSW, Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: After its locality.
 

Barringtonite Image

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Barringtonite   Lansfordite

Comments: Optical images of clusters of glassy lansfordite crystals and one white dehydrated barringtonite ? crystal. (AmMin, 88:1883).
Location: Crystals associated with the remains of a saguaro, Carnegiea gigantea from south and west central Arizona. Scale: Scale bar 800 µ-m.
© American Mineralogist

Barringtonite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.5209:1:1.0119
Help on Cell Dimensions: Cell Dimensions: a = 9.156, b = 6.02, c = 6.092, Z = 4; alpha = 94°, beta = 95.5°, gamma = 108.7° V = 315.82 Den(Calc)= 2.53
Help on Crystal System: Crystal System: TriclinicSpace Group: P1 or P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.936(1), 3.093(1), 8.682(1),
 

Physical Properties of Barringtonite

Help on Cleavage: Cleavage: [001] Distinct, [100] Distinct, [010] Distinct
Help on Color: Color: Colorless.
Help on Density: Density: 2.83
Help on Diaphaniety: Diaphaniety: Transparent
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Nodular - Tuberose forms having irregular protuberances over the surface.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Streak: Streak: white
 

Optical Properties of Barringtonite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.314 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.233 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1887,KPDmeas= 0.1687,KC= 0.2459
Help on Optical Data: Optical Data: Biaxial (+), a=1.458, b=1.473, g=1.501, bire=0.0430, 2V(Calc)=74, 2V(Meas)=73.7.
 

Calculated Properties of Barringtonite

Help on Electron Density: Electron Density:

relectron=2.61 gm/cc
note: rBarringtonite =2.53 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.02161
Boson Index = 0.97839
Help on Photoelectric: Photoelectric:

PEBarringtonite = 0.67 barns/electron
U=PEBarringtonite x relectron= 1.76 barns/cc.

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

Barringtonite is Not Radioactive

 

Barringtonite Classification

Help on  Dana Class: Dana Class: 15.1.5.1 (15)Hydrated Carbonates
  (15.1)where A+ (XO3) · x(H2O)
  (15.1.5)Dana Group
 
15.1.5.1 Barringtonite MgCO3·2(H2O) P1 or P1 Tri
Help on  Strunz Class: Strunz Class: V/D.01-10 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 Barringtonite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Barringtonite :
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 -École des Mines de Paris

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Print or Cut-and-Paste your Barringtonite Specimen Label here :

Barringtonite

MgCO3·2(H2O)
Dana No: 15.1.5.1 Strunz No: V/D.01-10
Locality:

 

Notes:

 

 
   
 
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