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Hibonite Mineral Data

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General Hibonite Information

Help on Chemical  Formula: Chemical Formula: (Ca,Ce)(Al,Ti,Mg)12O19
Help on Composition: Composition: Molecular Weight = 708.81 gm
   Calcium     4.52 %  Ca    6.33 % CaO
   Lanthanum   1.96 %  La    2.30 % La2O3
   Cerium      1.98 %  Ce    2.32 % Ce2O3
   Magnesium   0.17 %  Mg    0.28 % MgO
   Titanium    3.38 %  Ti    5.63 % TiO2
   Aluminum   39.59 %  Al   74.80 % Al2O3
   Iron        5.52 %  Fe    7.10 % FeO
   Oxygen     42.89 %  O
             ______        ______ 
             100.00 %       98.76 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca0.8Ce0.1La0.1Al10.4Ti0.5Fe2+0.7Mg0.05O19
Help on Environment: Environment: In metamorphosed limestone, pyroxenite, gneiss, and granulate of the amphibolite to granulite facies.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1956
Help on Locality: Locality: Esiva, near Taolanaro (Fort Dauphin), and near Ambindandrakemba, Madagascar. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Paul Hibon, who discovered the mineral.
Help on Name Pronunciation: Name Pronunciation: Hibonite Say HIBONITE

Hibonite Image

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Comments: Crystalline spire-like specimen of hibonite.
Location: Ambindandrakemba, Madagascar. Scale: 2.1 x 1.5 cm.
© John Veevaert

Hibonite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:3.93457
Help on Cell Dimensions: Cell Dimensions: a = 5.564, c = 21.892, Z = 2; V = 586.94 Den(Calc)= 4.01
Help on Crystal System: Crystal System: Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 63/mmc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.505(1), 2.648(0.8), 2.812(0.6),

Physical Properties of Hibonite

Help on Cleavage: Cleavage: {0001} Good, {1010} Parting
Help on Color: Color: Black, Black, Reddish brown.
Help on Density: Density: 3.84
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 7.5-8
Help on Luster: Luster: Metallic
Help on Streak: Streak: reddish brown

Optical Properties of Hibonite

Help on Dichroism (e): Dichroism (e): gray.
Help on Dichroism (w): Dichroism (w): brownish gray.
Help on Optical Data: Optical Data: Uniaxial (-).
  NCalc= 1.85 - from Gladstone-Dale relationship (KC = 0.2109) where Ncalc=Dcalc*KC+1
NCalc= 1.81 - from Gladstone-Dale relationship (KC = 0.2109) where Ncalc=Dmeas*KC+1

Calculated Properties of Hibonite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.90 gm/cc
note: Specific Gravity of Hibonite =4.01 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0059923554
Boson Index = 0.9940076446
Help on Photoelectric: Photoelectric: PEHibonite = 22.00 barns/electron
U=PEHibonite x relectron= 85.75 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 4,081.56 (Gamma Ray American Petroleum Institute Units)
Concentration of Hibonite per GRapi unit = 245.00 (PPM)

Hibonite is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Radioactivity from Hibonite - mild
Curies (Ci)
If Held in Hand
For One Hour
1000 gm / 7.81 cm 88,177 2.38E-06 4,081.56 1.34
100 gm / 3.62 cm 8,818 2.38E-07 408.16 0.13
10 gm / 1.68 cm 882 2.38E-08 40.82 0.01
1 gm / 7.81 mm 88 2.38E-09 4.08 0.00
0.1 gm / 3.62 mm 9 2.38E-10 0.41 0.00
0.01 gm / 1.68 mm 1 2.38E-11 0.04 0.00
0.001 gm / 0.78 mm 0 2.38E-12 0.00 0.00

Weight of pure Hibonite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.01 gm/cc.*
Goverment Estimate of Average Annual Exposure ( 360 mRem) **
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem
Estimated Thorium Activity ( 0.20 % Th) From Sum REE Elements ( 3.94 % REE)

Hibonite Classification

Help on  Dana Class: Dana Class: (07)Multiple Oxides
  (07.04)with O19 groups
  (07.04.01)(Hexagonal, P63/mmc) Hibonite (Ca,Ce)(Al,Ti,Mg)12O19 P 63/mmc 6/m 2/m 2/m Yimengite K(Cr,Ti,Fe,Mg)12O19 P 63/mmc 6/m 2/m 2/m Hawthorneite Ba[Ti3Cr4Fe4Mg]O19 P 63/mmc 6/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 04.CC.45 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.C - Metal:Oxygen = 2:3, 3:5, and Similar
  04.CC -With large and medium-sized cations
04.CC.45 Hawthorneite Ba[Ti3Cr4Fe4Mg]O19 P 63/mmc 6/m 2/m 2/m
04.CC.45 Diaoyudaoite NaAl11O17 P 63/mmc 6/m 2/m 2/m
04.CC.45 Magnetoplumbite Pb(Fe,Mn)12O19 P 63/mmc 6/m 2/m 2/m
04.CC.45 Haggertyite! Ba[Fe6Ti5Mg]O19 P 63/mmc 6/m 2/m 2/m
04.CC.45 Batiferrite! Ba(Ti2Fe8Fe2)O19 P 63/mmc 6/m 2/m 2/m
04.CC.45 Hibonite (Ca,Ce)(Al,Ti,Mg)12O19 P 63/mmc 6/m 2/m 2/m
04.CC.45 Nezilovite! PbZn2(Mn,Ti)2Fe8O19 P 63/mmc 6/m 2/m 2/m
04.CC.45 Lindqvistite Pb2(Mn,Mg)Fe16027 P 63/mmc 6/m 2/m 2/m
04.CC.45 Plumboferrite Pb2Fe(11-x)MnxO19-2x(x=1/3) P 63/mmc 6/m 2/m 2/m
04.CC.45 Yimengite K(Cr,Ti,Fe,Mg)12O19 P 63/mmc 6/m 2/m 2/m

Other Hibonite Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Hibonite :
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: 04.CC.45





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