Mineralogy Database

Magnesiohulsite Mineral Data

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General Magnesiohulsite Information

Help on Chemical  Formula: Chemical Formula: (Mg,Fe++)2(Mg,Fe+++,Sn++++)O2(BO3)
Help on Composition: Composition: Molecular Weight = 188.93 gm
   Magnesium  30.87 %  Mg   51.20 % MgO
   Iron       14.78 %  Fe    9.51 % FeO / 10.57 % Fe2O3
   Tin         6.28 %  Sn    7.98 % SnO2
   Boron       5.72 %  B    18.42 % B2O3
   Oxygen     42.34 %  O
             ______        ______ 
             100.00 %       97.67 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mg2.4Fe2+0.25Fe3+0.25Sn0.1O2(BO3)
Help on IMA Status: IMA Status: Approved IMA 1985
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition and for Alfred Hulse Brooks (1871-1924), U. S. Geologist.
Help on Name Pronunciation: Name Pronunciation: Magnesiohulsite Say MAGNESIOHULSITE

Magnesiohulsite Image

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Comments: Green fibrous massive magnesiohulsite.
Location: Itenyurgin, Chukot Peninsula, Magadan District, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Magnesiohulsite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =3.4967:1:1.781
Help on Cell Dimensions: Cell Dimensions: a = 10.7, b = 3.06, c = 5.45, Z = 2; beta = 94.6° V = 177.87 Den(Calc)= 3.53
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2/m

Physical Properties of Magnesiohulsite

Help on Cleavage: Cleavage: None
Help on Color: Color: Black.
Help on Density: Density: 4.18
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 5.5-6.5 - Knife Blade-Pyrite
Help on Luster: Luster: Sub Metallic
Help on Streak: Streak: dark brown

Optical Properties of Magnesiohulsite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.07 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.267 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2592,KPDmeas= 0.2189,KC= 0.2046
Ncalc = 1.72 - 1.86
Help on Optical Data: Optical Data: Biaxial (?), a=1.88, g=1.95, bire=0.0700
Help on Pleochroism (x): Pleochroism (x): dark green.
Help on Pleochroism (z): Pleochroism (z): dark brown.

Calculated Properties of Magnesiohulsite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.06 gm/cc
note: Specific Gravity of Magnesiohulsite =4.18 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEMagnesiohulsite = 22.99 barns/electron
U=PEMagnesiohulsite x rElectron Density= 93.40 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Magnesiohulsite is Not Radioactive

Magnesiohulsite 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 Magnesiohulsite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Magnesiohulsite :
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.AB.45





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