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Iquiqueite

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About IquiqueiteHide

Iquique, Chile
Formula:
K3Na4Mg(CrO4)B24O39(OH) · 12H2O
Colour:
Bright yellow
Lustre:
Vitreous
Hardness:
2
Specific Gravity:
2.05
Crystal System:
Hexagonal
Name:
Named for the city of Iquique (pronounced ee-KEE-kay) in 2016. It was a major historic port for nitrate shipments from Tarapacá, Chile from the 1830s until the 1930s.
This page provides mineralogical data about Iquiqueite.


Classification of IquiqueiteHide

Approved
Approval Year:
1984
First Published:
1986
Approval History:
IMA1984-019
6.H0.20

6 : BORATES
H : Unclassified borates
0 :
27.1.8.1

27 : COMPOUND BORATES
1 : Miscellaneous
9.2.17

9 : Borates
2 : Borates of Be and Mg

Physical Properties of IquiqueiteHide

Vitreous
Colour:
Bright yellow
Streak:
Pale yellow to yellow
Hardness:
Tenacity:
Brittle
Cleavage:
Perfect
(0001)
Density:
2.05 g/cm3 (Measured)    

Optical Data of IquiqueiteHide

Type:
Uniaxial (-)
RI values:
nω = 1.502 nε = 1.447
Max Birefringence:
δ = 0.055
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of IquiqueiteHide

Formula:
K3Na4Mg(CrO4)B24O39(OH) · 12H2O

Crystallography of IquiqueiteHide

Crystal System:
Hexagonal
Cell Parameters:
a = 11.63 Å, c = 30.15 Å
Ratio:
a:c = 1 : 2.592
Unit Cell V:
3,531.65 ų (Calculated from Unit Cell)

Type Occurrence of IquiqueiteHide

General Appearance of Type Material:
Platelets singly or as vermiform aggregates.
Place of Conservation of Type Material:
National Museum of Natural History (Smithsonian), Washington, D.C., USA, 163774.
Geological Setting of Type Material:
Nitrate fields
Reference:
Ericksen, G.E., Mrose, M.E., Marinenko, J.W., McGee, J.J. (1986) Mineralogical studies of the nitrate deposits of Chile. V. Iquiqueite, Na4K3Mg(CrO4)B24O39(OH).12H2O, a new saline mineral. American Mineralogist: 71: 830-836.

Synonyms of IquiqueiteHide

Other Language Names for IquiqueiteHide

German:Iquiqueit
Spanish:Iquiqueita

Common AssociatesHide

Associated Minerals Based on Photo Data:
Nitratine5 photos of Iquiqueite associated with Nitratine on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

6.H0.10Braitschite-(Ce)(Ca,Na2)7(Ce,La)2B22O43 · 7H2OHex.
6.H0.15SatimoliteKNa2(Al5Mg2)[B12O18(OH)12](OH)6Cl4·4H2OTrig. 3m (3 2/m) : R3m
6.H0.25WardsmithiteCa5Mg[B4O7]6 · 30H2OHex.
6.H0.35HalurgiteMg2[B4O7]2 · 5H2OMon.
6.H0.40EkateriniteCa2(B4O7)(Cl,OH)2 · 2H2OHex.
6.H0.45VitimiteCa6[(OH)14|SO4|B14O19] · 5H2OMon.
6.H0.50CanavesiteMg2(HBO3)(CO3) · 5H2OMon.
6.H0.55QilianshaniteNaHCO3 · H3BO3 · 2H2OMon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

9.2.1HambergiteBe2(BO3)(OH)Orth. mmm (2/m 2/m 2/m) : Pbca
9.2.2SuaniteMg2[B2O5]Mon.
9.2.3KotoiteMg3[BO3]2Orth. mmm (2/m 2/m 2/m) : Pnnm
9.2.4SzaibélyiteMgBO2(OH)Mon.
9.2.5PreobrazhenskiteMg3B11O15(OH)9Orth.
9.2.6AksaiteMg[B6O7(OH)6] · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbca
9.2.7WightmaniteMg5(BO3)O(OH)5 · 2H2OMon.
9.2.8PinnoiteMg[B2O(OH)6]Tet. 4/m : P42/m
9.2.9KurnakoviteMgB3O3(OH)5 · 5H2OTric. 1 : P1
9.2.10HalurgiteMg2[B4O7]2 · 5H2OMon.
9.2.11InderiteMgB3O3(OH)5 · 5H2OMon. 2/m : P21/b
9.2.12HungchaoiteMg(B4O7) · 9H2OTric. 1
9.2.13AdmontiteMgB6O10 · 7H2OMon.
9.2.14McallisteriteMg2[B6O7(OH)6]2 · 9H2OTrig. 3m (3 2/m) : R3c
9.2.15RivadaviteNa6Mg[B6O7(OH)6]4 · 10H2OMon. 2/m : P21/m
9.2.16KaliboriteKMg2H[B6O8(OH)5]2(H2O)4Mon. 2/m : B2/b

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for IquiqueiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Ericksen, G.E., Mrose, M.E., Marinenko, J.W., McGee, J.J. (1986) Mineralogical studies of the nitrate deposits of Chile. V. Iquiqueite, Na4K3Mg(CrO4)B24O39(OH).12H2O, a new saline mineral. American Mineralogist: 71: 830-836.
Grew, E.S., Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for IquiqueiteHide

Localities for IquiqueiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Chile
 
  • Antofagasta Region
    • El Loa Province
RRUFF Specimen ID: R060822
  • Tarapacá Region
    • El Tamarugal Province
Amer.Min.(1986) 71, 830-836
Mineral and/or Locality  
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