Canavesite Mineral Data

General Canavesite Information

Chemical Formula:

Mg2(CO3)(HBO3)•5(H2O)

Composition:

Molecular Weight = 258.51 gm

Magnesium 18.80 % Mg 31.18 % MgO

Boron 4.18 % B 13.47 % B₂O₃

Hydrogen 4.29 % H 38.33 % H₂O

Carbon 4.65 % C 17.02 % CO₂

Oxygen 68.08 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mg₂(CO₃)(HBO₃)•5(H₂O)

Environment:

Found in fractures in ludwigite and magnetite skarns.

IMA Status:

Approved IMA 1978

Locality:

Vola Gera tunnel, Brosso iron mine, Canavese district, Piedmont, Italy. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Canavesite + Pronunciation

Canavesite Image

Images:

Canavesite

Comments: White acicular crystals of canavesite on matrix.
Location: Brosso Mine, Ivrea, Piedmont, Italy. Scale: Picture size 9 mm.
© Thomas Witzke / Abraxas-Verlag

Canavesite Crystallography

Axial Ratios:

a:b:c =3.8108:1:3.5545

Cell Dimensions:

a = 23.49, b = 6.164, c = 21.91, Z = 12; beta = 114.91° V = 2,877.27 Den(Calc)= 1.79

Crystal System:

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

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

By Intensity(I/I_o): 9.54(1), 8.12(0.4), 4.56(0.21),3.11(0.2), 7.53(0.2), 7.8(0.2), 3.33(0.1), 3.69(0.1),

Physical Properties of Canavesite

Cleavage:

{h0l} Distinct, {h0l} Distinct

Color:

White.

Density:

1.8

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Rosette - Bundled tabular aggregates resembling rose flower petals.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Canavesite

Gladstone-Dale:

CI meas= -0.067 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.073 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2764,KPDmeas= 0.2748,KC= 0.2576
Ncalc = 1.46

Optical Data:

Biaxial (+), a=1.485, b=1.494, g=1.505, bire=0.0200, 2V(Calc)=86, 2V(Meas)=large.

Calculated Properties of Canavesite

Electron Density:

Bulk Density (Electron Density)=1.87 gm/cc
note: Specific Gravity of Canavesite =1.80 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

PE_Canavesite= 0.65 barns/electron
U=PE_Canavesite x rElectron Density= 1.21 barns/cc.

Radioactivity:

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

Canavesite Classification

Dana Class:

17.01.08.01 (17)Compound Carbonates

(17.01)with miscellaneous formulae

(17.01.08)Dana Group

17.01.08.01 Canavesite Mg2(CO3)(HBO3)•5(H2O) P 2/m 2/m

Strunz Class:

06.HA.50 06 - BORATES

06.H - Unclassified Borates

06.HA -Unclassified borates

06.HA.50 Canavesite Mg2(CO3)(HBO3)•5(H2O) P 2/m 2/m

Other Canavesite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Canavesite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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

Canavesite

Mg2(CO3)(HBO3)•5(H2O)
Dana No: 17.01.08.01 Strunz No: 06.HA.50
Locality:

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