Hungchaoite Mineral Data

General Hungchaoite Information

Chemical Formula: MgB4O5(OH)4•7(H2O) 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 Empirical Formula: MgB₄O₅(OH)₄•7(H₂O) Environment: Lacustrine saline borate deposits IMA Status: Approved IMA 1964 Locality: Unspecified locality in China [the Qinghai-Xizang Plateau, Tibet]. Link to MinDat.org Location Data. Name Origin: Named for Chang Hung-chao (1877-1951), Chinese geologist and mineralogist. Name Pronunciation: Hungchaoite + Pronunciation Synonym: ICSD 10423   PDF 34-1288  

Search for Hungchaoite Images

Images:   

Hungchaoite Crystallography

Axial Ratios: a:b:c =0.8277:1:0.741 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 Crystal System: Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1 X Ray Diffraction: By Intensity(I/I_o): 6.71(1), 3.356(0.92), 5.36(0.85), Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Wan C , Ghose S , American Mineralogist , 62 (1977) p.1135-1143, Hungchaoite, Mg(H2O)5B4O5(OH)4.2H2O: a hydrogen-bonded molecular complex

 

Physical Properties of Hungchaoite

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

Optical Properties of Hungchaoite

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 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

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

Hungchaoite Classification

Dana Class: 26.04.03.01 (26)Hydrated Borates Containing Hydroxyl or Halogen   (26.04)Dana Type   (26.04.03)Dana Group  

26.04.03.01 Hungchaoite MgB4O5(OH)4•7(H2O) P1 1

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

References: NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) 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
15 - WWW-MINCRYST
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Hungchaoite :

A Bijoux Google Search for Hungchaoite
Adam's Minerals Google Search for Hungchaoite
Cape Minerals Google Search for Hungchaoite
Dakota Matrix Minerals Google Search for Hungchaoite
Excalibur Mineral Corp. Google Search for Hungchaoite
Exceptional Minerals Google Search for Hungchaoite
John Betts Fine Minerals Search for Hungchaoite
McDougall Minerals Google Search for Hungchaoite
Mineral News Website Link
Rock and Mineral Shows Google Search for Hungchaoite
Weinrich Minerals, Inc. Google Search for Hungchaoite

Ask about Hungchaoite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Hungchaoite Specimen Label here :