Mineralogy Database

Pinakiolite Mineral Data

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General Pinakiolite Information

Help on Chemical  Formula: Chemical Formula: Mg2Mn+++O2(BO3)
Help on Composition: Composition: Molecular Weight = 194.36 gm
   Magnesium  25.01 %  Mg   41.48 % MgO
   Manganese  28.27 %  Mn   40.61 % Mn2O3
   Boron       5.56 %  B    17.91 % B2O3
   Oxygen     41.16 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg2Mn3+O2(BO3)
Help on Environment: Environment: In dolomite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1890
Help on Locality: Locality: Langban, Varmland, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the Greek for "small tablet", in allusion to the morphology.
Help on Name Pronunciation: Name Pronunciation: Pinakiolite + Pronunciation Say PINAKIOLITE
Help on Synonym: Synonym: ICSD 33723
  PDF 36-413

Pinakiolite Image

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Comments: Black submetallic platy pinakiolite crystals in white calcite.
Location: Langban, Varmland, Sweden. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Pinakiolite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =3.6456:1:0.8935
Help on Cell Dimensions: Cell Dimensions: a = 21.79, b = 5.977, c = 5.341, Z = 8; beta = 95.63° V = 692.25 Den(Calc)= 3.73
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.51(1), 2.7(0.9), 5.42(0.8),1.99(0.6), 1.54(0.5), 1.5(0.4), 1.62(0.4), 2.16(0.4),
Help on Forms: Forms:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 0 1 0) ( 3 1 0) ( 0 0 1)

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Physical Properties of Pinakiolite

Help on Cleavage: Cleavage: {010} Good
Help on Color: Color: Black.
Help on Density: Density: 3.88
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luster: Luster: Adamantine - Metallic
Help on Streak: Streak: brown gray

Optical Properties of Pinakiolite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.272 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.323 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3224,KPDmeas= 0.31,KC= 0.2437
Ncalc = 1.91 - 1.95
Help on Optical Data: Optical Data: Biaxial (-), a=1.908, b=2.05, g=2.65, bire=0.7420, 2V(Calc)=64, 2V(Meas)=32. Dispersion r < v.
Help on Pleochroism (x): Pleochroism (x): reddish brown.
Help on Pleochroism (y): Pleochroism (y): nearly opaque black.
Help on Pleochroism (z): Pleochroism (z): yellowish red.

Calculated Properties of Pinakiolite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.75 gm/cc
note: Specific Gravity of Pinakiolite =3.88 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEPinakiolite = 7.85 barns/electron
U=PEPinakiolite x rElectron Density= 29.47 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Pinakiolite is Not Radioactive

Pinakiolite Classification

Help on  Dana Class: Dana Class: (24)Borates - Anhydrous
  (24.02)where (A)2 BO2 [XO3]
  (24.02.04)Dana Group Pinakiolite Mg2MnO2(BO3) C 2/m 2/m
Help on  Strunz Class: Strunz Class: 06.AB.35 06 - BORATES
  06.A - Monoborates
  06.AB -BO3, with additional anions; 1(D) + OH, etc.
06.AB.35 Pinakiolite Mg2MnO2(BO3) C 2/m 2/m

Other Pinakiolite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Pinakiolite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - Scandinavian mineral gallery

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Dana No: Strunz No: 06.AB.35





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