Mineralogy Database

Hungchaoite Mineral Data

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General Hungchaoite Information

Help on Chemical  Formula: Chemical Formula: MgB4O5(OH)4•7(H2O)
Help on Composition: Composition: Molecular Weight = 341.68 gm
   Magnesium   7.11 %  Mg   11.80 % MgO
   Boron      12.66 %  B    40.75 % B2O3
   Hydrogen    5.31 %  H    47.45 % H2O
   Oxygen     74.92 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: MgB4O5(OH)4•7(H2O)
Help on Environment: Environment: Lacustrine saline borate deposits
Help on IMA Status: IMA Status: Approved IMA 1964
Help on Locality: Locality: Unspecified locality in China [the Qinghai-Xizang Plateau, Tibet]. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Chang Hung-chao (1877-1951), Chinese geologist and mineralogist.
Help on Name Pronunciation: Name Pronunciation: Hungchaoite + Pronunciation Say HUNGCHAOITE
Help on Synonym: Synonym: ICSD 10423
  PDF 34-1288

Hungchaoite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8277:1:0.741
Help on Cell Dimensions: Cell Dimensions: a = 8.811, b = 10.644, c = 7.888, Z = 2; alpha = 103.38°, beta = 108.58°, gamma = 97.15° V = 676.88 Den(Calc)= 1.68
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 6.71(1), 3.356(0.92), 5.36(0.85),

Physical Properties of Hungchaoite

Help on Cleavage: Cleavage: {111} Good, {111} Good
Help on Color: Color: Colorless, White.
Help on Density: Density: 1.706
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Streak: Streak: white

Optical Properties of Hungchaoite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.018 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.022 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2784,KPDmeas= 0.2775,KC= 0.2725
Ncalc = 1.46
Help on Optical Data: Optical Data: Biaxial (-), a=1.445, b=1.485, g=1.49, bire=0.0450, 2V(Calc)=38, 2V(Meas)=15.

Calculated Properties of Hungchaoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=1.78 gm/cc
note: Specific Gravity of Hungchaoite =1.71 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEHungchaoite = 0.46 barns/electron
U=PEHungchaoite x rElectron Density= 0.82 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Hungchaoite is Not Radioactive

Hungchaoite Classification

Help on  Dana Class: Dana Class: (26)Hydrated Borates Containing Hydroxyl or Halogen
  (26.04)Dana Type
  (26.04.03)Dana Group Hungchaoite MgB4O5(OH)4•7(H2O) P1 1
Help on  Strunz Class: Strunz Class: 06.DA.20 06 - BORATES
  06.D - Tetraborates
  06.DA -Neso-tetraborates
06.DA.20 Hungchaoite MgB4O5(OH)4•7(H2O) P1 1

Other Hungchaoite Information

Help on References: References: NAME( AntBidBlaNic5) 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 Hungchaoite :
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.DA.20





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