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Iquiqueite

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Salar de Miraje, El Loa Province, Antofagasta Region, Chile
© Thomas Witzke

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Formula:
K
 
3
Na
 
4
Mg(CrO
 
4
)B
 
24
O
 
39
(OH) · 12H
 
2
O
System:HexagonalHardness:2
This page provides mineralogical data about Iquiqueite.

Classification of Iquiqueite

IMA status:Approved
Strunz 8th edition ID:6/F.03-10
Nickel-Strunz 10th (pending) edition ID:6.HA.20

6 : BORATES
H : Unclassified borates
A :
Dana 8th edition ID:27.1.8.1

27 : COMPOUND BORATES
1 : Miscellaneous
Hey's CIM Ref.:9.2.17

9 : Borates
2 : Borates of Be and Mg
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Type Occurrence of Iquiqueite

Type Locality:Zapiga, Iquique Province, Tarapacá Region, Chile
Year of Discovery:1986

Physical Properties of Iquiqueite

Hardness (Mohs):2

Crystallography of Iquiqueite

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

Optical Data of Iquiqueite

Type:Uniaxial (-)
RI values: nω = 1.502 nε = 1.447
Maximum Birefringence:δ = 0.055

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate

Chemical Properties of Iquiqueite

Formula:
K
 
3
Na
 
4
Mg(CrO
 
4
)B
 
24
O
 
39
(OH) · 12H
 
2
O
Essential elements:B, Cr, H, K, Mg, Na, O
All elements listed in formula:B, Cr, H, K, Mg, Na, O

Relationship of Iquiqueite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
6.HA.05Chelkarite
CaMgB
 
2
O
 
4
(Cl,OH)
 
2
 · 5H
 
2
O Or near, with Cl:OH = 3:1
6.HA.15Satimolite
KNa
 
2
Al
 
4
[Cl|B
 
2
O
 
5
]
 
3
 · 13H
 
2
O
6.HA.25Wardsmithite
Ca
 
5
Mg[B
 
4
O
 
7
]
 
6
 · 30H
 
2
O
6.HA.35Halurgite
Mg
 
2
[B
 
4
O
 
7
]
 
2
 · 5H
 
2
O
6.HA.45Vitimite
Ca
 
6
[(OH)
 
14
|SO
 
4
|B
 
14
O
 
19
] · 5H
 
2
O
6.HA.55Qilianshanite
NaHCO
 
3
 · H
 
3
BO
 
3
 · 2H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
9.2.1Hambergite
Be
 
2
(BO
 
3
)(OH)
9.2.2Suanite
Mg
 
2
[B
 
2
O
 
5
]
9.2.3Kotoite
Mg
 
3
[BO
 
3
]
 
2
9.2.4Szaibélyite
Mg
 
2
[(OH)(B
 
2
O
 
4
(OH))]
9.2.5Preobrazhenskite
Mg
 
3
B
 
11
O
 
15
(OH)
 
9
9.2.6Aksaite
Mg[B
 
6
O
 
7
(OH)
 
6
] · 2H
 
2
O
9.2.7Wightmanite
Mg
 
5
(BO
 
3
)O(OH)
 
5
 · 2H
 
2
O
9.2.8Pinnoite
Mg[B
 
2
O(OH)
 
6
]
9.2.9Kurnakovite
Mg(H
 
4
B
 
3
O
 
7
)(OH) · 5H
 
2
O
9.2.10Halurgite
Mg
 
2
[B
 
4
O
 
7
]
 
2
 · 5H
 
2
O
9.2.11Inderite
Mg(H
 
4
B
 
3
O
 
7
)(OH) · 5H
 
2
O
9.2.12Hungchaoite
Mg(B
 
4
O
 
7
) · 9H
 
2
O
9.2.13Admontite
Mg[B
 
6
O
 
7
(OH)
 
6
] · 4H
 
2
O
9.2.14Mcallisterite
Mg
 
2
[B
 
6
O
 
7
(OH)
 
6
]
 
2
 · 9H
 
2
O
9.2.15Rivadavite
Na
 
6
Mg[B
 
6
O
 
7
(OH)
 
6
]
 
4
 · 10H
 
2
O
9.2.16Kaliborite
KMg
 
2
H[B
 
6
O
 
8
(OH)
 
5
]
 
2
(H
 
2
O)
 
4

Other Names for Iquiqueite

Synonyms:
IMA1984-019
Other Languages:
German:Iquiqueit
Spanish:Iquiqueita

Other Information

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

References for Iquiqueite

Reference List:

- +
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., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for Iquiqueite

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    • Localities for Iquiqueite

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    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Chile
     
    • Antofagasta Region
      • El Loa Province
    		No reference listed
    • Tarapacá Region
      • Iquique Province
    		Amer.Min.(1986) 71, 830-836
    Mineral and/or Locality
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