Mineralogy Database

Lautarite Mineral Data

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General Lautarite Information

Help on Chemical  Formula: Chemical Formula: Ca(IO3)2
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Ca(IO3)2
Help on Environment: Environment: Coating fractures or embedded in gypsum in the nitrate deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1891
Help on Locality: Locality: Pampa del Pique III, about one km north of Oficina Lautaro, Taltal district, Antofagasta, Chile. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Lautarite + Pronunciation Say LAUTARITE
Help on Synonym: Synonym: ICSD 1391
  PDF 28-221

Lautarite Image

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Comments: Sealed specimen jar with lautarite with nitratine..
Location: Atacama Desert, Chile. Scale: 3 cm Tall.
© Adam Larson

Lautarite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.644:1:0.6323
Help on Cell Dimensions: Cell Dimensions: a = 7.28, b = 11.304, c = 7.148, Z = 4; beta = 106.36° V = 564.41 Den(Calc)= 4.59
Help on Crystal System: 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/Io): 3.156(1), 3.428(0.85), 3.493(0.65),
Help on Forms: Forms:

Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize

S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu

Help on Above

Forms: ( 0 1 0) ( 0 1 1) ( 1 1 0) ( 1 2 0) ( 0 0 1)

Warning: this java applet does not work in some browsers because of security restrictions.


Physical Properties of Lautarite

Help on Cleavage: Cleavage: {011} Good, {100} Indistinct, {110} Indistinct
Help on Color: Color: Colorless, Yellowish, Light yellow.
Help on Density: Density: 4.519
Help on Diaphaneity: Diaphaneity: Transparent
Help on Hardness: Hardness: 3.5-4 - Copper Penny-Fluorite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Lautarite

Help on Gladstone-Dale: 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
Ncalc = 1.89 - 1.9
Help on Optical Data: 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

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.03 gm/cc
note: Specific Gravity of Lautarite =4.52 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0002569578
Boson Index = 0.9997430422
Help on Photoelectric: Photoelectric: PELautarite = 247.03 barns/electron
U=PELautarite x rElectron Density= 996.41 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Lautarite is Not Radioactive

Lautarite Classification

Help on  Dana Class: Dana Class: (21)Iodates - Anhydrous and Hydrated
  (21.01)with miscellaneous formulae
  (21.01.01)Dana Group Lautarite Ca(IO3)2 P 21/n 2/m
Help on  Strunz Class: Strunz Class: 04.KA.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.K - Iodates
  04.KA -Iodates without additional anions, without H2O
04.KA.05 Lautarite Ca(IO3)2 P 21/n 2/m

Other Lautarite Information

Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Lautarite :
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

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Dana No: Strunz No: 04.KA.05





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