Artinite Mineral Data

Artinite Mineral Data +

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General Artinite Information

Chemical Formula:

Mg2(CO3)(OH)2·3(H2O)

Composition:

Molecular Weight = 196.68 gm

Magnesium 24.72 % Mg 40.98 % MgO

Hydrogen 4.10 % H 36.64 % H₂O

Carbon 6.11 % C 22.38 % CO₂

Oxygen 65.08 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mg₂(CO₃)(OH)₂·3(H₂O)

Environment:

Low-temperature hydrothermal mineral in veins and crusts in serpentinized ultrabasic rocks.

IMA Status:

Valid Species (Pre-IMA) 1902

Locality:

Val Brutta, and Francia in the Val Lanterna, Lombardy, Italy. Link to MinDat.org Location Data.

Name Origin:

Named after the Italian mineralogist, Ettore Artini (1866-1928), mineralogist at the University of Milan.

Synonym:

Cuproartinite-Cu

ICSD 1320

PDF 6-484

Artinite Image

Images:

Artinite

Comments: Bright, white acicular sprays of artinite crystals on matrix.
Location: New Idria district, San Benito County, California, USA. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Images:

Artinite

Comments: White, acicular clusters of artinite on matrix.
Location: San Benito County, California, USA. Scale: Cluster size 1.3 cm.
© Minernet

Artinite Crystallography

Axial Ratios:

a:b:c =5.2571:1:1.9746

Cell Dimensions:

a = 16.56, b = 3.15, c = 6.22, Z = 2; beta = 99° V = 320.47 Den(Calc)= 2.04

Crystal System:

MonoclinicSpace Group: C 2 or C 2/m

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

By Intensity(I/I_o): 2.736(1), 5.34(0.65), 3.69(0.5),

Physical Properties of Artinite

Cleavage:

[100] Perfect, [001] Good

Color:

White.

Density:

2 - 2.03, Average = 2.01

Diaphaniety:

Translucent

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Hardness:

2.5 - Finger Nail

Luminescence:

None.

Luster:

Silky

Magnetism:

Nonmagnetic

Streak:

white

Optical Properties of Artinite

Gladstone-Dale:

CI meas= -0.029 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.016 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2579,KPDmeas= 0.2611,KC= 0.2538

Optical Data:

Biaxial (-), a=1.488-1.489, b=1.533-1.534, g=1.556-1.557, bire=0.0680, 2V(Calc)=68, 2V(Meas)=71. Dispersion none.

Pleochroism (x):

none.

Pleochroism (y):

none.

Pleochroism (z):

none.

Calculated Properties of Artinite

Electron Density:

r_electron=2.12 gm/cc
note: r_Artinite=2.04 gm/cc.

Fermion Index

Fermion Index = 0.0257
Boson Index = 0.9743

Photoelectric:

PE_Artinite= 0.74 barns/electron
U=PE_Artinite x r_electron= 1.57 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Artinite is Not Radioactive

Artinite Classification

Dana Class:

16b.3.1.1 (16b)Carbonates - Hydroxyl or Halogen

(16b.3)where Am Bn (XO3)p Zq · x(H2O), (m+n):p = 2:1

(16b.3.1)Dana Group

16b.3.1.1 Artinite Mg2(CO3)(OH)2·3(H2O) C 2 or C 2/m Mono

16b.3.1.2 Chlorartinite! Mg2(CO3)Cl(OH)·3(H2O) R 3c (?) 3m

Strunz Class:

V/E.01-40 V - Nitrates, Carbonates and Borates

V/E - Water-bearing carbonates with unfamiliar anions

V/E.01 - Hydromagnesite - Brugnatellite series

V/E.01-10 Hydromagnesite Mg5(CO3)4(OH)2·4(H2O) P 2₁/c 2/m

V/E.01-15 Widgiemoolthalite (Ni,Mg)5(CO3)4(OH)2·4-5(H2O) P 2₁/c 2/m

V/E.01-20 Dypingite Mg5(CO3)4(OH)2·5(H2O) Unk. Mono

V/E.01-30 Giorgiosite Mg5(CO3)4(OH)2·5(H2O) ? Mono

V/E.01-40 Artinite Mg2(CO3)(OH)2·3(H2O) C 2 or C 2/m Mono

V/E.01-50 Indigirite Mg2Al2(CO3)4(OH)2·15(H2O) Unk. Mono

V/E.01-60 Coalingite Mg10Fe2(CO3)(OH)24·2(H2O) R 3c 3 2/m

V/E.01-70 Brugnatellite Mg6Fe(CO3)(OH)13·4(H2O) P 6₃/mmc 6/m 2/m 2/m

Other Artinite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)

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

Artinite

Mg2(CO3)(OH)2·3(H2O)
Dana No: 16b.3.1.1 Strunz No: V/E.01-40
Locality:

Notes: