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Hulsite Mineral Data

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General Hulsite Information

Help on Chemical  Formula: Chemical Formula: (Fe++,Mg)2(Fe+++,Sn)O2(BO3)
Help on Composition: Composition: Molecular Weight = 233.09 gm
   Magnesium  10.43 %  Mg   17.29 % MgO
   Iron       45.52 %  Fe   30.82 % FeO / 30.83 % Fe2O3
   Tin         5.09 %  Sn    6.47 % SnO2
   Boron       4.64 %  B    14.93 % B2O3
   Oxygen     34.32 %  O
             ______        ______ 
             100.00 %      100.34 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+MgFe3+0.9Sn0.1O2(BO3)
Help on Environment: Environment: Metamorphosed limestone at a granite contact.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1908
Help on Locality: Locality: Brooks mountain, Seward peninsula, Alaska. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Alfred Hulse Brooks (1871-1924), U. S. Geologist.
Help on Name Pronunciation: Name Pronunciation: Hulsite Say HULSITE
Help on Synonym: Synonym: ICSD 12133
  PDF 17-511

Hulsite Image

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Comments: Black crystalline granular massive hulsite.
Location: Brooks Range, Seward Peninsula, Alaska, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Hulsite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =3.4477:1:1.7508
Help on Cell Dimensions: Cell Dimensions: a = 10.695, b = 3.102, c = 5.431, Z = 2; beta = 94.21° V = 179.69 Den(Calc)= 4.31
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.664(1), 2.585(0.7), 5.35(0.7),

Physical Properties of Hulsite

Help on Cleavage: Cleavage: {110} Good
Help on Color: Color: Black.
Help on Density: Density: 4.3
Help on Diaphaneity: Diaphaneity: Opaque
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 3 - Calcite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Sub Metallic
Help on Streak: Streak: black

Optical Properties of Hulsite

Help on Optical Data: Optical Data: NCalc= 2 - from Gladstone-Dale relationship (KC = 0.231) where Ncalc=Dcalc*KC+1
NCalc= 1.99 - from Gladstone-Dale relationship (KC = 0.231) where Ncalc=Dmeas*KC+1

Calculated Properties of Hulsite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.12 gm/cc
note: Specific Gravity of Hulsite =4.31 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEHulsite = 28.80 barns/electron
U=PEHulsite x rElectron Density= 118.64 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hulsite is Not Radioactive

Hulsite Classification

Help on  Dana Class: Dana Class: (24)Borates - Anhydrous
  (24.02)where (A)2 BO2 [XO3]
  (24.02.03)Dana Group Hulsite (Fe,Mg)2(Fe,Sn)O2(BO3) P 2/m 2/m Magnesiohulsite (Mg,Fe)2(Mg,Fe,Sn)O2(BO3) P 2/m 2/m Aluminomagnesiohulsite! Mg2(Al,Mg,Sn)(BO3)O2 P 2/m 2/m
Help on  Strunz Class: Strunz Class: 06.AB.45 06 - BORATES
  06.A - Monoborates
  06.AB -BO3, with additional anions; 1(D) + OH, etc.
06.AB.45 Hulsite (Fe,Mg)2(Fe,Sn)O2(BO3) P 2/m 2/m
06.AB.45 Magnesiohulsite (Mg,Fe)2(Mg,Fe,Sn)O2(BO3) P 2/m 2/m
06.AB.45 Aluminomagnesiohulsite! Mg2(Al,Mg,Sn)(BO3)O2 P 2/m 2/m

Other Hulsite Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Hulsite :
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 - HyperPhysics
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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Dana No: Strunz No: 06.AB.45





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