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Penobsquisite Mineral Data

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General Penobsquisite Information

Help on Chemical  Formula: Chemical Formula: Ca2Fe++[B9O13(OH)6]Cl•4(H2O)
Help on Composition: Composition: Molecular Weight = 650.84 gm
   Calcium   12.32 %  Ca   17.23 % CaO
   Iron       8.58 %  Fe   11.04 % FeO
   Boron     14.95 %  B    48.13 % B2O3
   Hydrogen   2.17 %  H    19.38 % H2O
   Chlorine   5.45 %  Cl    5.45 % Cl
               -   %   Cl   -1.23 % -O=Cl2   
   Oxygen    56.54 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2Fe2+B9O13(OH)6Cl•4(H2O)
Help on Environment: Environment: Upper Halite member of the evaporite sequence.
Help on IMA Status: IMA Status: Approved IMA 1994 (Dana # Added)
Help on Locality: Locality: Potash Corporation of Saskatchewan (New Brunswick Division) mine at Penobsquis, Kings County, New Brunswick, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the locality.
Help on Name Pronunciation: Name Pronunciation: Penobsquisite + Pronunciation Say PENOBSQUISITE
Help on Synonym: Synonym: ICSD 82484
  PDF 49-1868

Penobsquisite Image

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Comments: Clear crystal of penobsquisite.
Location: Inder B deposit and salt dome, Atyrau Oblysy, Kazakhstan. Scale: Crystal Size 7x6x4 mm.
© Sergey Vasiliev / Systematic Mineralogy

Penobsquisite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.2398:1:0.9312
Help on Cell Dimensions: Cell Dimensions: a = 11.63, b = 9.38, c = 8.735, Z = 2; beta = 98.4° V = 942.67 Den(Calc)= 2.29
Help on Crystal System: Crystal System: Monoclinic - Sphenoidal H-M Symbol (2) Space Group: P 21
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.29(1)(110), 2.113(0.3)(114), 8.65(0.3)(001),2.958(0.3)(320,312,031), 4.5(0.2)(211), 5.32(0.2)(111),

Physical Properties of Penobsquisite

Help on Cleavage: Cleavage: None
Help on Color: Color: Pale yellow.
Help on Density: Density: 2.26
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Penobsquisite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.027 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2469,KPDmeas= 0.2501,KC= 0.2435
Ncalc = 1.55 - 1.56
Help on Optical Data: Optical Data: Biaxial (+/-), a=1.55, b=1.554, g=1.592, bire=0.0420

Calculated Properties of Penobsquisite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.29 gm/cc
note: Specific Gravity of Penobsquisite =2.29 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEPenobsquisite = 4.57 barns/electron
U=PEPenobsquisite x rElectron Density= 10.48 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Penobsquisite is Not Radioactive

Penobsquisite 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.GB.10 06 - BORATES
  06.G - Heptaborates and other Megaborates
  06.GB -Phyllo-nonborates, etc.
06.GB.10 Penobsquisite! Ca2Fe[B9O13(OH)6]Cl•4(H2O) P 21 2

Other Penobsquisite Information

Help on References: References: NAME( CanMin) PHYS. PROP.(Eur. J. Min.,Vol.8,1996) OPTIC PROP.(Eur. J. Min.,Vol.8,1996)
Help on See Also: See Also: Links to other databases for Penobsquisite :
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.GB.10





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