General Magnesiohulsite Information![]() (Mg,Fe++)2(Mg,Fe+++,Sn++++)O2(BO3) |
![]() Molecular Weight = 188.93 gm |
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Magnesium 30.87 % Mg 51.20 % MgO |
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Iron 14.78 % Fe 9.51 % FeO / 10.57 % Fe2O3 |
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Tin 6.28 % Sn 7.98 % SnO2 |
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Boron 5.72 % B 18.42 % B2O3 |
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Oxygen 42.34 % O |
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100.00 % 97.67 % = TOTAL OXIDE |
![]() Mg2.4Fe2+0.25Fe3+0.25Sn0.1O2(BO3) |
![]() Approved IMA 1985 |
![]() Link to MinDat.org Location Data. |
![]() Named for the composition and for Alfred Hulse Brooks (1871-1924), U. S. Geologist. |
![]() Magnesiohulsite |
![]() | | Magnesiohulsite Image
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Magnesiohulsite Crystallography![]() a:b:c =3.4967:1:1.781 |
![]() a = 10.7, b = 3.06, c = 5.45, Z = 2; beta = 94.6° V = 177.87 Den(Calc)= 3.53 |
![]() Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2/m |
| Physical Properties of Magnesiohulsite![]() None |
![]() Black. |
![]() 4.18 |
![]() Transparent to Translucent |
![]() Acicular - Occurs as needle-like crystals. |
![]() Aggregates - Made of numerous individual crystals or clusters. |
![]() Microscopic Crystals - Crystals visible only with microscopes. |
![]() 5.5-6.5 - Knife Blade-Pyrite |
![]() Sub Metallic |
![]() dark brown |
| Optical Properties of Magnesiohulsite![]() 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 ![]() Biaxial (?), a=1.88, g=1.95, bire=0.0700 |
![]() dark green. |
![]() dark brown. |
| Calculated Properties of Magnesiohulsite![]() Bulk Density (Electron Density)=4.06 gm/cc |
note: Specific Gravity of Magnesiohulsite =4.18 gm/cc. ![]() Fermion Index = 0.05 |
Boson Index = 0.95 ![]() PEMagnesiohulsite = 22.99 barns/electron |
U=PEMagnesiohulsite x rElectron Density= 93.40 barns/cc. ![]() GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Magnesiohulsite is Not Radioactive | Magnesiohulsite Classification![]() 24.02.03.02 (24)Borates - Anhydrous |
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(24.02)where (A)2 BO2 [XO3] |
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(24.02.03)Dana Group |
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![]() 06.AB.45 06 - BORATES |
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06.A - Monoborates |
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06.AB -BO3, with additional anions; 1(D) + OH, etc. |
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| Other Magnesiohulsite Information![]() NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8) |
![]() 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 Search for Magnesiohulsite using: Visit our Advertisers for Magnesiohulsite : A Bijoux Google Search for MagnesiohulsiteAdam's Minerals Google Search for Magnesiohulsite Cape Minerals Google Search for Magnesiohulsite Dakota Matrix Minerals Google Search for Magnesiohulsite Excalibur Mineral Corp. Google Search for Magnesiohulsite Exceptional Minerals Google Search for Magnesiohulsite John Betts Fine Minerals Search for Magnesiohulsite McDougall Minerals Google Search for Magnesiohulsite Mineral News Website Link Rock and Mineral Shows Google Search for Magnesiohulsite Weinrich Minerals, Inc. Google Search for Magnesiohulsite Ask about Magnesiohulsite here : Print or Cut-and-Paste your Magnesiohulsite Specimen Label here :
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