Mineralogy Database

Seamanite Mineral Data

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General Seamanite Information

Help on Chemical  Formula: Chemical Formula: Mn3(PO4)B(OH)6
Help on Composition: Composition: Molecular Weight = 372.64 gm
   Manganese   44.23 %  Mn   57.11 % MnO
   Boron        2.90 %  B     9.34 % B2O3
   Phosphorus   8.31 %  P    19.05 % P2O5
   Hydrogen     1.62 %  H    14.50 % H2O
   Oxygen      42.94 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+3(PO4)B(OH)6
Help on Environment: Environment: In fractures cutting siliceous rock.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1930
Help on Locality: Locality: Chicagoan mine, near Iron River, Iron Co., Michigan, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Professor Arthur Edmund Seaman (1858-1937), American mineralogist, Michigan College of Mining and Technology, Houghton, Michigan, USA
Help on Name Pronunciation: Name Pronunciation: Seamanite + Pronunciation Say SEAMANITE
Help on Synonym: Synonym: ICSD 34850
  PDF 25-536

Seamanite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5168:1:0.4427
Help on Cell Dimensions: Cell Dimensions: a = 7.811, b = 15.114, c = 6.691, Z = 4; V = 789.91 Den(Calc)= 3.13
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pbnm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.917(1), 2.843(0.8), 3.777(0.7),
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 1) ( 1 1 0)

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Physical Properties of Seamanite

Help on Cleavage: Cleavage: {???} Indistinct, {001} Distinct
Help on Color: Color: Yellow, Yellow brown, Light pink, Wine yellow.
Help on Density: Density: 3.13
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white

Optical Properties of Seamanite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.033 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.033 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2096,KPDmeas= 0.2096,KC= 0.2168
Ncalc = 1.68
Help on Optical Data: Optical Data: Biaxial (+), a=1.64, b=1.663, g=1.665, bire=0.0250

Calculated Properties of Seamanite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.04 gm/cc
note: Specific Gravity of Seamanite =3.13 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0059813679
Boson Index = 0.9940186321
Help on Photoelectric: Photoelectric: PESeamanite = 11.72 barns/electron
U=PESeamanite x rElectron Density= 35.64 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Seamanite is Not Radioactive

Seamanite Classification

Help on  Dana Class: Dana Class: (43)Compound Phosphates, etc.
  (43.04)(Anhydrous Compound Anions With Hydroxyl or Halogen)
  (43.04.05)Dana Group Seamanite Mn3(PO4)B(OH)6 Pbnm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 06.AC.65 06 - BORATES
  06.A - Monoborates
  06.AC -B(O,OH)4, without and with additional anions; 1(T), 1(T)+OH, etc.
06.AC.65 Seamanite Mn3(PO4)B(OH)6 Pbnm 2/m 2/m 2/m

Other Seamanite Information

Help on References: References: NAME( AntBidBlaNic4) 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 Seamanite :
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.AC.65





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