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Hydrochlorborite

Big Photo

Salar de Carcote, Ollagüe, El Loa Province, Antofagasta Region, Chile
© 2007, JGW

Formula:
Ca
 
4
B
 
8
O
 
15
Cl
 
2
·21H
 
2
O
System:MonoclinicHardness:2½
This page provides mineralogical data about Hydrochlorborite.

Classification of Hydrochlorborite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Explanation of status:Paper was not submitted to IMA for approval (1965); considered grandfathered, however.
Strunz 8th edition ID:5/H.07-10
Nickel-Strunz 10th (pending) edition ID:6.DA.30

6 : BORATES
D : Tetraborates
A : Neso-tetraborates
Dana 8th edition ID:26.3.4.1

26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
3 : Triborates
Hey's CIM Ref.:10.1.12

10 : Borates with other anions
1 : Borates with halide
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Type Occurrence of Hydrochlorborite

Co-type Localities:Salar de Carcote, Ollagüe, El Loa Province, Antofagasta Region, Chile
China
Year of Discovery:1965

Physical Properties of Hydrochlorborite

Hardness (Mohs):2½

Crystallography of Hydrochlorborite

Crystal System:Monoclinic
Cell Parameters:a = 22.78Å, b = 8.74Å, c = 17.06Å
β = 96.7°
Ratio:a:b:c = 2.606 : 1 : 1.952
Unit Cell Volume:V 3,373.40 ų (Calculated from Unit Cell)
Crystal Atlas:
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Hydrochlorborite - Tabular {001}

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Optical Data of Hydrochlorborite

Type:Biaxial (+)
RI values: nα = 1.499 nβ = 1.502 nγ = 1.521
2V:Measured: 45° , Calculated: 44°
Maximum Birefringence:δ = 0.022

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

Chemical Properties of Hydrochlorborite

Formula:
Ca
 
4
B
 
8
O
 
15
Cl
 
2
·21H
 
2
O
Essential elements:B, Ca, Cl, H, O
All elements listed in formula:B, Ca, Cl, H, O

Relationship of Hydrochlorborite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
6.DA.10Borax
Na
 
2
[B
 
4
O
 
7
] · 10H
 
2
O
6.DA.15Tincalconite
Na
 
2
[B
 
4
O
 
7
] · 5H
 
2
O
6.DA.20Hungchaoite
Mg[B
 
4
O
 
7
] · 9H
 
2
O
6.DA.25Fedorovskite
Ca
 
2
(Mg,Mn
2+
 
)
 
2
[(OH)
 
6
|B
 
4
O
 
7
]
6.DA.25Roweite
Ca
 
2
Mn
2+
2
[(OH)
 
6
|B
 
4
O
 
7
]
6.DA.35Uralborite
Ca
 
2
[B
 
3
O
 
3
(OH)
 
5
·OB(OH)
 
3
]
6.DA.40Borcarite
Ca
 
4
Mg[(CO
 
3
)
 
2
|B
 
4
O
 
6
(OH)
 
6
]
6.DA.40Numanoite
Ca
 
4
Cu[(CO
 
3
)
 
2
|B
 
4
O
 
6
(OH)
 
6
]
Related Minerals - Hey's Index Grouping:

- +
10.1.1Teepleite
Na
 
2
[Cl|B(OH)
 
4
]
10.1.2Bandylite
Cu[Cl|B(OH)
 
4
]
10.1.3Berborite
Be
 
2
[(OH,F)|BO
 
3
] · H
 
2
O
10.1.4Fluoborite
Mg
 
3
[(F,OH)
 
3
|BO
 
3
]
10.1.5Boracite
Mg
 
3
[Cl|B
 
7
O
 
13
]
10.1.6Karlite
Mg
 
7
[(OH,Cl)
 
5
|(BO
 
3
)
 
3
]
10.1.7Shabynite
Mg
 
5
[(Cl,OH)
 
2
|(OH)
 
5
|BO
 
3
] · 4H
 
2
O
10.1.8/9/10Hilgardite
Ca
 
2
B
 
5
O
 
9
Cl·H
 
2
O
10.1.11Solongoite
Ca
 
2
(H
 
3
B
 
3
O
 
7
)(OH)Cl
10.1.13Ekaterinite
Ca
 
2
[(Cl,OH)
 
2
|B
 
4
O
 
7
] · 2H
 
2
O
10.1.14Volkovskite
KCa
 
4
[B
 
5
O
 
8
OH]
 
4
[B(OH)
 
3
]
 
2
Cl·4H
 
2
O
10.1.15Chelkarite
CaMgB
 
2
O
 
4
(Cl,OH)
 
2
·5H
 
2
O Or near, with Cl:OH = 3:1
10.1.16Johachidolite
CaAlB
 
3
O
 
7
10.1.17Satimolite
KNa
 
2
Al
 
4
[Cl|B
 
2
O
 
5
]
 
3
 · 13H
 
2
O
10.1.18Chambersite
Mn
2+
3
[Cl|B
 
7
O
 
13
]
10.1.19Congolite
(Fe
2+
 
,Mg)
 
3
B
 
7
O
 
13
Cl
10.1.20Ericaite
Fe
2+
3
[Cl|B
 
7
O
 
13
]

Other Names for Hydrochlorborite

Other Languages:
German:Hydrochlorborit
Russian:Гидрохлорборит
Spanish:Hydrochlorborita

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 Hydrochlorborite

Reference List:Chien Tzu-Chiang and Chen Su-Chien (1965): Brief note on preliminary results of a study of a new borate mineral - Hydrochlorborite: Ca4B8O15Cl2 * 22H2O. Scientia Sinica 14, 945-946 (in Russian).

Qian Ziqiang, Chen Shuzhen, Ma Shinian, and Liu Xunjian (1965): Hydrochlorborite, a new hydrous chlor-borate mineral. Acta Geologica Sinica 45(2), 209-216 (in Chinese with English abstract). - American Mineralogist 50, 2099 (abstract).

American Mineralogist 62, 147-150.

Brown & Clark (1978), Crystal structure of hydrochlorborite, A seasonal evaporite mineral: American Mineralogist 63, 814-823.

Internet Links for Hydrochlorborite

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  • Hydrochlorborite details from Handbook of Mineralogy (PDF)
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    Localities for Hydrochlorborite

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    The 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.
    (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
        • Ollagüe
    		AmMin. 62:147-150 (1977)
    China
    Chien Tzu-Chiang and Chen Su-Chien (1965): Scientia Sinica 14, 945-946.
    Chien Tzu-Chiang and Chen Su-Chien (1965): Scientia Sinica 14, 945-946.
    Mineral and/or Locality
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