Lautarite Mineral Data

Lautarite Mineral Data +

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General Lautarite Information

Chemical Formula:

Ca(IO3)2

Composition:

Molecular Weight = 389.88 gm

Calcium 10.28 % Ca 14.38 % CaO

Iodine 65.10 % I 85.62 % I₂O₅

Oxygen 24.62 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca(IO₃)₂

IMA Status:

Valid Species (Pre-IMA) 1891

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 1391

PDF 28-221

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Lautarite Crystallography

Axial Ratios:

a:b:c =0.644:1:0.6323

Cell Dimensions:

a = 7.28, b = 11.304, c = 7.148, Z = 4; beta = 106.36° V = 564.41 Den(Calc)= 4.59

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/n

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

By Intensity(I/I_o): 3.156(1), 3.428(0.85), 3.493(0.65),

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Physical Properties of Lautarite

Cleavage:

[011] Good, [100] Indistinct, [110] Indistinct

Color:

Colorless, Yellowish, Light yellow.

Density:

4.519

Diaphaniety:

Transparent

Hardness:

3.5-4 - Copper Penny-Fluorite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Lautarite

Gladstone-Dale:

CI meas= 0.057 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.072 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.183,KPDmeas= 0.1859,KC= 0.1972

Optical Data:

Biaxial (+), a=1.792, b=1.84, g=1.888, bire=0.0960, 2V(Calc)=86, 2V(Meas)=90.

Calculated Properties of Lautarite

Electron Density:

r_electron=4.03 gm/cc
note: r_Lautarite=4.52 gm/cc.

Fermion Index

Fermion Index = 0.00025
Boson Index = 0.99975

Photoelectric:

PE_Lautarite= 247.03 barns/electron
U=PE_Lautarite x r_electron= 996.41 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Lautarite is Not Radioactive

Lautarite Classification

Dana Class:

21.1.1.1 (21)Iodates - Anhydrous and Hydrated

(21.1)with miscellaneous formulae

(21.1.1)Dana Group

21.1.1.1 Lautarite Ca(IO3)2 P 2₁/n 2/m

Strunz Class:

IV/L.01-10 IV - Oxides

IV/L - Iodates with [IO3]1- groups

IV/L.01 - Lautarite - Dietzeite series

IV/L.01-10 Lautarite Ca(IO3)2 P 2₁/n 2/m

IV/L.01-20 Bruggenite Ca(IO3)2·(H2O) P 2₁/c 2/m

IV/L.01-30 Dietzeite Ca2(IO3)2(CrO4) P 2₁/c 2/m

Other Lautarite Information

References:

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

See Also:

Links to other databases for Lautarite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Lautarite

Ca(IO3)2
Dana No: 21.1.1.1 Strunz No: IV/L.01-10
Locality:

Notes: