Calciborite Mineral Data

General Calciborite Information

Chemical Formula:

CaB2O4

Composition:

Molecular Weight = 125.70 gm

Calcium 31.88 % Ca 44.61 % CaO

Boron 17.20 % B 55.39 % B₂O₃

Oxygen 50.91 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaB₂O₄

Environment:

Drillcore into a contact metasomatized limestone near a quartz diorite intrusion associated with a copper deposit in skarn.

IMA Status:

Valid Species (Pre-IMA) 1956

Locality:

Novofrolovskoye copper deposit, near Krasnoturinsk, Turinsk district, Northern Ural Mountains, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the essential chemical components, CALCIum and BORon.

Name Pronunciation:

Calciborite + Pronunciation

Synonym:

ICSD 20097

PDF 27-67

Calciborite Image

Images:

Calciborite

Comments: Translucent colorless crystalline calciborite.
Location: Novofrolovskoye, Sverdlovsk District, Northern Urals, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Calciborite Crystallography

Axial Ratios:

a:b:c =0.6068:1:0.362

Cell Dimensions:

a = 8.38, b = 13.81, c = 5, Z = 8; V = 578.64 Den(Calc)= 2.89

Crystal System:

Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pccn

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

By Intensity(I/I_o): 1.867(1), 3.445(1), 1.97(0.9),

Physical Properties of Calciborite

Cleavage:

None

Color:

White.

Density:

2.878

Fracture:

Conchoidal - Uneven - Uneven fracture producing small, conchoidal fragments.

Hardness:

3.5 - Copper Penny

Streak:

white

Optical Properties of Calciborite

Gladstone-Dale:

CI meas= -0.045 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.04 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2213,KPDmeas= 0.2223,KC= 0.2128
Ncalc = 1.61

Optical Data:

Biaxial (-), a=1.595, b=1.654, g=1.67, bire=0.0750, 2V(Calc)=52, 2V(Meas)=54.

Calculated Properties of Calciborite

Electron Density:

Bulk Density (Electron Density)=2.85 gm/cc
note: Specific Gravity of Calciborite =2.89 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_Calciborite= 4.14 barns/electron
U=PE_Calciborite x rElectron Density= 11.79 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Calciborite is Not Radioactive

Calciborite Classification

Dana Class:

24.05.02.01 (24)Borates - Anhydrous

(24.05)with miscellaneous formulae

(24.05.02)Dana Group

24.05.02.01 Calciborite CaB2O4 Pccn 2/m 2/m 2/m

24.05.02.02 Santarosaite! CuB2O4 I 42d; 4 2m

Strunz Class:

06.BC.10 06 - BORATES

06.B - Diborates

06.BC -Ino-diborates with triangles and/or tetrahedra

06.BC.10 Aldzhanite* CaMgB2O4Cl•7(H2O)(?) Unk Ortho

06.BC.10 Calciborite CaB2O4 Pccn 2/m 2/m 2/m

Other Calciborite 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 Calciborite :
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 Calciborite Specimen Label here :

Calciborite

CaB2O4
Dana No: 24.05.02.01 Strunz No: 06.BC.10
Locality:

Notes:

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