Mineralogy Database

Brianroulstonite Mineral Data

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General Brianroulstonite Information

Help on Chemical  Formula: Chemical Formula: Ca3[B5O6(OH)6](OH)Cl2•8(H2O)
Help on Composition: Composition: Molecular Weight = 604.36 gm
   Calcium   19.89 %  Ca   27.84 % CaO
   Boron      8.94 %  B    28.80 % B2O3
   Hydrogen   3.84 %  H    34.28 % H2O
   Chlorine  11.73 %  Cl   11.73 % Cl
               -   %   Cl   -2.65 % -O=Cl2   
   Oxygen    55.59 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca3(B5O6)(OH)6(OH)Cl2•8(H2O)
Help on Environment: Environment: In the lower third of the Upper Halite member of the Mississippian-aged Widsor Group evaporites.
Help on IMA Status: IMA Status: Approved IMA 1997 (Dana # Added)
Help on Locality: Locality: Potash Corporation of Saskatchewan Mine, 5 km east of Penobsquis, Carwell Parish, Kings County, New Brunswick, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For Brian V. Roulston (1948-), in recognition of his work on the geology of evaporite deposits.
Help on Name Pronunciation: Name Pronunciation: Brianroulstonite + Pronunciation Say BRIANROULSTONITE
Help on Synonym: Synonym: ICSD 89259
  PDF 50-1632

Brianroulstonite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =2.1567:1:1.0727
Help on Cell Dimensions: Cell Dimensions: a = 17.42, b = 8.077, c = 8.665, Z = 2; beta = 121.483° V = 1,039.71 Den(Calc)= 1.93
Help on Crystal System: Crystal System: Monoclinic - Domatic H-M Symbol (m) Space Group: Pa
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.1(1), 4.04(0.4), 3.56(0.2),

Physical Properties of Brianroulstonite

Help on Cleavage: Cleavage: {010} Perfect
Help on Color: Color: Colorless, White.
Help on Density: Density: 1.97
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Flexible - Flexible fragments.
Help on Habit: Habit: Cleaveable - Easily cleaved into fragments.
Help on Habit: Habit: Micaceous - Platy texture with "flexible" plates.
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Brianroulstonite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.034 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2703,KPDmeas= 0.2648,KC= 0.274
Ncalc = 1.53 - 1.54
Help on Optical Data: Optical Data: Biaxial (-), a=1.506, b=1.527, g=1.532, bire=0.0260, 2V(Calc)=50, 2V(Meas)=56. Dispersion none.

Calculated Properties of Brianroulstonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.98 gm/cc
note: Specific Gravity of Brianroulstonite =1.93 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEBrianroulstonite = 3.32 barns/electron
U=PEBrianroulstonite x rElectron Density= 6.58 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Brianroulstonite is Not Radioactive

Brianroulstonite Classification

Help on  Dana Class: Dana Class: (26)Hydrated Borates Containing Hydroxyl or Halogen
  (26.05)Dana Type
  (26.05.17)Pringleite Group Pringleite Ca9B26O34(OH)24Cl4•13(H2O) P1 1 Ruitenbergite Ca9B26O34(OH)24Cl4•13(H2O) P 21 2 Brianroulstonite! Ca3[B5O6(OH)6](OH)Cl2•8(H2O) Pa m Penobsquisite! Ca2Fe[B9O13(OH)6]Cl•4(H2O) P 21 2 Walkerite! Ca16(Mg,Li,[])2[B13O17(OH)12]4Cl6•28(H2O) Pba2 mm2
Help on  Strunz Class: Strunz Class: 06.EC.35 06 - BORATES
  06.E - Pentaborates
  06.EC -Phyllo-pentaborates
06.EC.35 Brianroulstonite! Ca3[B5O6(OH)6](OH)Cl2•8(H2O) Pa m

Other Brianroulstonite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.83,p400-403,1998) OPTIC PROP.(MinRec)
Help on See Also: See Also: Links to other databases for Brianroulstonite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 06.EC.35





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