Mineralogy Database

Pinnoite Mineral Data

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General Pinnoite Information

Help on Chemical  Formula: Chemical Formula: MgB2O4•3(H2O)
Help on Composition: Composition: Molecular Weight = 163.97 gm
   Magnesium  14.82 %  Mg   24.58 % MgO
   Boron      13.19 %  B    42.46 % B2O3
   Hydrogen    3.69 %  H    32.96 % H2O
   Oxygen     68.30 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: MgB2O4•3(H2O)
Help on Environment: Environment: Evaporite salt deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1884
Help on Locality: Locality: Stassfurt and Aschersleben, Saxony, Germany. Eagle Borax works, Death Valley, California, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for chief councilor of Mines, Pinno, of Halle, Germany.
Help on Name Pronunciation: Name Pronunciation: Pinnoite Say PINNOITE
Help on Synonym: Synonym: ICSD 20662
  PDF 25-119

Pinnoite Image

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  Pinnoite   Inderite

Comments: Pale green translucent crystalline pinnoite on chalky white inderite.
Location: Lake Inder, Atyrau, Kazakhstan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Pinnoite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.07522
Help on Cell Dimensions: Cell Dimensions: a = 7.617, c = 8.19, Z = 4; V = 475.17 Den(Calc)= 2.29
Help on Crystal System: Crystal System: Tetragonal - Pyramidal H-M Symbol (4) Space Group: P 42
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 5.39(1), 2.31(0.7), 2.05(0.5),3.16(0.4), 1.91(0.3), 2.25(0.3), 1.57(0.2),
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: ( 1 1 2) ( 1 1 0) ( 0 1 1)

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Physical Properties of Pinnoite

Help on Cleavage: Cleavage: {???} Indistinct
Help on Color: Color: Colorless, Yellow, Yellow green, Light yellow.
Help on Density: Density: 2.29
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
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 Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Pinnoite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.014 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2489,KPDmeas= 0.2489,KC= 0.2525
Ncalc = 1.58
Help on Optical Data: Optical Data: Uniaxial (+), w=1.565, e=1.575, bire=0.0100.

Calculated Properties of Pinnoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.35 gm/cc
note: Specific Gravity of Pinnoite =2.29 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEPinnoite = 0.58 barns/electron
U=PEPinnoite x rElectron Density= 1.36 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Pinnoite is Not Radioactive

Pinnoite Classification

Help on  Dana Class: Dana Class: (25)Anhydrous Borates Containing Hydroxyl or Halogen
  (25.02)Dana Type
  (25.02.03)Dana Group Pinnoite MgB2O4•3(H2O) P 42 4
Help on  Strunz Class: Strunz Class: 06.BB.05 06 - BORATES
  06.B - Diborates
  06.BB -Neso-diborates with double tetrahedra B2O(OH)6; 2(2T)
06.BB.05 Pinnoite MgB2O4•3(H2O) P 42 4

Other Pinnoite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Pinnoite :
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

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Dana No: Strunz No: 06.BB.05





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