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Iquiqueite Mineral Data

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General Iquiqueite Information

Help on Chemical  Formula: Chemical Formula: K3Na4Mg(Cr++++++O4)B24O39(OH)•12(H2O)
Help on Composition: Composition: Molecular Weight = 1,466.16 gm
   Potassium   8.00 %  K     9.64 % K2O
   Sodium      6.27 %  Na    8.45 % Na2O
   Magnesium   1.66 %  Mg    2.75 % MgO
   Chromium    3.55 %  Cr    6.82 % CrO3
   Boron      17.70 %  B    56.98 % B2O3
   Hydrogen    1.72 %  H    15.36 % H2O
   Oxygen     61.11 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K3Na4Mg(CrO4)B24O39(OH)•12(H2O)
Help on Environment: Environment: Generally disseminated in nitratine ore.
Help on IMA Status: IMA Status: Approved IMA 1986
Help on Locality: Locality: Iquique, Tarapaca Province, Chile. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality
Help on Name Pronunciation: Name Pronunciation: Iquiqueite + Pronunciation Say IQUIQUEITE

Iquiqueite Image

Click Here for Larger   Image in a New Browser Window Images:
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  Iquiqueite   Nitratine

Comments: Yellow iquiqueiite in clear, massive nitration.
Location: Salar de Miraje, Antofagasta, Chile. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Iquiqueite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:2.59158
Help on Cell Dimensions: Cell Dimensions: a = 11.6369, c = 30.158, Z = 3; V = 3,536.78 Den(Calc)= 2.06
Help on Crystal System: Crystal System: Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: P 31c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.856(1), 3.02(1), 10.11(0.85),

Physical Properties of Iquiqueite

Help on Cleavage: Cleavage: {0001} Perfect, {0110} Indistinct
Help on Color: Color: Yellow.
Help on Density: Density: 2.05
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: yellow white

Optical Properties of Iquiqueite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.028 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.032 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2303,KPDmeas= 0.2315,KC= 0.238
Ncalc = 1.49
Help on Optical Data: Optical Data: Uniaxial (-), e=1.447, w=1.502, bire=0.0550.

Calculated Properties of Iquiqueite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.04 gm/cc
note: Specific Gravity of Iquiqueite =2.05 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEIquiqueite = 1.95 barns/electron
U=PEIquiqueite x relectron= 3.98 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 114.94 (Gamma Ray American Petroleum Institute Units)
Concentration of Iquiqueite per GRapi unit = 0.87 (%)

Estimated Radioactivity from Iquiqueite - barely detectable


Iquiqueite Classification

Help on  Dana Class: Dana Class: (27)Compound Borates
  (27.01)Dana Type
  (27.01.08)Dana Group Iquiqueite K3Na4Mg(CrO4)B24O39(OH)•12(H2O) P 31c 3m
Help on  Strunz Class: Strunz Class: 06.HA.20 06 - BORATES
  06.H - Unclassified Borates
  06.HA -Unclassified borates
06.HA.20 Iquiqueite K3Na4Mg(CrO4)B24O39(OH)•12(H2O) P 31c 3m

Other Iquiqueite Information

Help on References: References: NAME( Dana8) 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 Iquiqueite :
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: 06.HA.20





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