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

Images:

Uralborite

Comments: Micro crystals of Uralborite in a capsule.
Location: Fuka mine, Bitchu-cho, Okayama Prefecture, Japan. Scale: Crystal Size 2 mm.
© Tom Loomis / Dakota Matrix

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 - Prismatic H-M Symbol (2/m) Space Group: P 2₁/n

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.13(1), 7.61(1), 2.97(0.9),

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

Uralborite

CaB2O2(OH)4
Dana No: 25.03.04.01 Strunz No: 06.DA.35
Locality:

Notes:

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