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Halurgite

Big Photo

Chelkar salt dome, Aksai Valley, Aqtöbe Oblysy (Aktubinsk [Aktyubinsk; Aktubinskaya] Oblast'), Kazakhstan
© Peter Kohorst

Formula:
Mg
 
2
[B
 
4
O
 
7
]
 
2
 · 5H
 
2
O
System:Monoclinic
This page provides mineralogical data about Halurgite.

Classification of Halurgite

IMA status:Approved
Strunz 8th edition ID:5/H.12-10
Nickel-Strunz 10th (pending) edition ID:6.HA.35

6 : BORATES
H : Unclassified borates
A :
Dana 8th edition ID:26.4.4.1

26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
4 : Tetraborates
Hey's CIM Ref.:9.2.10

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

Type Locality:Chelkar salt dome, Aksai Valley, Aqtöbe Oblysy (Aktubinsk [Aktyubinsk; Aktubinskaya] Oblast'), Kazakhstan
Year of Discovery:1960

Crystallography of Halurgite

Crystal System:Monoclinic
Cell Parameters:a = 13.25Å, b = 7.6Å, c = 13.2Å
β = 92.2°
Ratio:a:b:c = 1.743 : 1 : 1.737
Unit Cell Volume:V 1,328.26 ų (Calculated from Unit Cell)

Optical Data of Halurgite

Type:Biaxial (+)
RI values: nα = 1.532 nβ = 1.545 nγ = 1.572
2V:Measured: 70° , Calculated: 72°
Maximum Birefringence:δ = 0.040

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

Chemical Properties of Halurgite

Formula:
Mg
 
2
[B
 
4
O
 
7
]
 
2
 · 5H
 
2
O
Essential elements:B, H, Mg, O
All elements listed in formula:B, H, Mg, O

Relationship of Halurgite 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.20Iquiqueite
K
 
3
Na
 
4
Mg(CrO
 
4
)B
 
24
O
 
39
(OH)·12H
 
2
O
6.HA.25Wardsmithite
Ca
 
5
Mg[B
 
4
O
 
7
]
 
6
 · 30H
 
2
O
6.HA.40Ekaterinite
Ca
 
2
[(Cl,OH)
 
2
|B
 
4
O
 
7
] · 2H
 
2
O
6.HA.45Vitimite
Ca
 
6
[(OH)
 
14
|SO
 
4
|B
 
14
O
 
19
]·5H
 
2
O
6.HA.50Canavesite
Mg
 
2
[CO
 
3
|HBO
 
3
] · 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
[O|OH|BO
 
2
]
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
[O|(OH)
 
5
|BO
 
3
] · 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
9.2.11Inderite
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
9.2.17Iquiqueite
K
 
3
Na
 
4
Mg(CrO
 
4
)B
 
24
O
 
39
(OH)·12H
 
2
O

Other Names for Halurgite

Other Languages:
German:Halurgit
Russian:Галургинт
Spanish:Halurgita

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 Halurgite

Reference List:American Mineralogist (1962): 47: 1217-1218.

Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for Halurgite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Halurgite in the Natural History Museum (London) online catalogue
  • Halurgite details from Handbook of Mineralogy (PDF)
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    Localities for Halurgite

    (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.
    Kazakhstan
     
    • Aqtöbe Oblysy (Aktubinsk [Aktyubinsk; Aktubinskaya] Oblast')
      • Aksai Valley
    		Handbook of Mineralogy Vol V p 6; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Mineral and/or Locality
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