Uralborite Mineral Data

General Uralborite Information

Chemical Formula: CaB2O2(OH)4 Composition: Molecular Weight = 161.73 gm    Calcium   24.78 %  Ca   34.67 % CaO    Boron     13.37 %  B    43.05 % B₂O₃    Hydrogen   2.49 %  H    22.28 % H₂O    Oxygen    59.36 %  O             ______        ______              100.00 %      100.00 % = TOTAL OXIDE Empirical Formula: CaB₂O₂(OH)₄ Environment: Secondary mineral in boron-rich iron-ore skarns IMA Status: Approved IMA 1961 Locality: Novofrolovskoye copper deposit, near Krasnoturinsk, Turinsk district, Northern Ural Mountains, Russia. Link to MinDat.org Location Data. Name Origin: Named for the original locality in the URAL Mountains, Russia, and BORate in its composition. Name Pronunciation: Uralborite + Pronunciation Synonym: ICSD 200158   PDF 14-272  

Uralborite Image

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Uralborite Crystallography

Axial Ratios: a:b:c =0.5592:1:0.7956 Cell Dimensions: a = 6.881, b = 12.305, c = 9.791, Z = 8; beta = 97.46° V = 821.99 Den(Calc)= 2.61 Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/n X Ray Diffraction: By Intensity(I/I_o): 2.13(1), 7.61(1), 2.97(0.9), Crystal Structure:

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Simonov M A , Egorov-Tismenko Y K , Belov N V , Doklady Akademii Nauk SSSR , 234 (1977) p.822-825, Accurate crystal structure of uralborite, Ca2[B4O4(OH)8]

 

Physical Properties of Uralborite

Cleavage: {???} Indistinct Color: Colorless. Density: 2.6 Diaphaneity: Transparent Hardness: 4 - Fluorite Luminescence: Fluorescent, Long UV=violet. Luster: Vitreous (Glassy) Streak: white  

Optical Properties of Uralborite

Gladstone-Dale: CI meas= 0.028 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.032 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2335,KPDmeas= 0.2344,KC= 0.2411
Ncalc = 1.63 Optical Data: Biaxial (+), a=1.604, b=1.609, g=1.615, bire=0.0110 Pleochroism (x): colorless. Pleochroism (y): colorless. Pleochroism (z): colorless.  

Calculated Properties of Uralborite

Electron Density: Bulk Density (Electron Density)=2.64 gm/cc
note: Specific Gravity of Uralborite =2.60 gm/cc.
Fermion Index: Fermion Index = 0.02
Boson Index = 0.98 Photoelectric: PE_Uralborite = 3.21 barns/electron
U=PE_Uralborite x rElectron Density= 8.48 barns/cc.
Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Uralborite is Not Radioactive  

Uralborite Classification

Dana Class: 25.03.04.01 (25)Anhydrous Borates Containing Hydroxyl or Halogen   (25.03)Dana Type   (25.03.04)Dana Group  

25.03.04.01 Uralborite CaB2O2(OH)4 P 2₁/n 2/m

Strunz Class: 06.DA.35 06 - BORATES   06.D - Tetraborates   06.DA -Neso-tetraborates  

06.DA.35 Uralborite CaB2O2(OH)4 P 2₁/n 2/m

 

Other Uralborite 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 Uralborite :
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
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