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Solongoite

Formula:
Ca
 
2
(H
 
3
B
 
3
O
 
7
)(OH)Cl
System:MonoclinicColour:Colourless
Hardness:3½
Name:Named after its discovery locality


Inderite Group.

Classification of Solongoite

IMA status:Approved 1973
Strunz 8th edition ID:5/H.06-60
Nickel-Strunz 10th (pending) edition ID:6.CA.40

6 : BORATES
C : Triborates
A : Neso-triborates
Dana 8th edition ID:25.3.2.1

25 : ANHYDROUS BORATES CONTAINING HYDROXYL OR HALOGEN
3 : Triborates
Hey's CIM Ref.:10.1.11

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

Type Locality:Solongo B deposit, Vitim Plateau, Buriatia (Buryatia) Republic, Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia
Year of Discovery:1974

Physical Properties of Solongoite

Lustre:Vitreous
Colour:Colourless
Hardness (Mohs):3½

Crystallography of Solongoite

Crystal System:Monoclinic
Cell Parameters:a = 7.93Å, b = 7.26Å, c = 12.54Å
β = 94°
Ratio:a:b:c = 1.092 : 1 : 1.727
Unit Cell Volume:V 720.19 ų (Calculated from Unit Cell)

Optical Data of Solongoite

Type:Biaxial (+)
RI values: nα = 1.510 nβ = 1.510 nγ = 1.545
Maximum Birefringence:δ = 0.035

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

Chemical Properties of Solongoite

Formula:
Ca
 
2
(H
 
3
B
 
3
O
 
7
)(OH)Cl
Essential elements:B, Ca, Cl, H, O
All elements listed in formula:B, Ca, Cl, H, O

Relationship of Solongoite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
6.CA.10Ameghinite
Na(H
 
4
B
 
3
O
 
7
)
6.CA.15Inderite
Mg(H
 
4
B
 
3
O
 
7
)(OH) · 5H
 
2
O
6.CA.20Kurnakovite
Mg(H
 
4
B
 
3
O
 
7
)(OH) · 5H
 
2
O
6.CA.25Inderborite
CaMg(H
 
3
B
 
3
O
 
7
)
 
2
 · 8H
 
2
O
6.CA.30Meyerhofferite
Ca
 
2
(H
 
3
B
 
3
O
 
7
)
 
2
 · 4H
 
2
O
6.CA.35Inyoite
Ca(H
 
4
B
 
3
O
 
7
)(OH) · 4H
 
2
O
6.CA.45Peprossiite-(Ce)
(Ce,La)(Al
 
3
O)
 
2/3
B
 
4
O
 
10
6.CA.50Nifontovite
CaB
 
2
O
 
4
·2.3H
 
2
O
6.CA.55Olshanskyite
Ca
 
3
[OH|{B(OH)
 
4
}
 
2
]
 
2
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
10.1.12Hydrochlorborite
Ca
 
4
B
 
8
O
 
15
Cl
 
2
·21H
 
2
O
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 Solongoite

Synonyms:
IMA1973-017
Other Languages:
German:Solongoit
Russian:Солонгоит
Spanish:Solongoita

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 Solongoite

Reference List:Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva (1974): 113: 117-121.

American Mineralogist (1975): 60: 162.

Soviet Physics – Doklady: 19: 326-327.

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

Articles/Blogs about Solongoite

Internet Links for Solongoite

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

    (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.
    Japan
     
    • Honshu Island
      • Chugoku Region
        • Okayama Prefecture
          • Takahashi
            • Bitchu-cho (Bicchu-cho)
    		(I. Pekov analyses)
    Russia
     
    • Eastern-Siberian Region
      • Transbaikalia (Zabaykalye)
        • Buriatia (Buryatia) Republic
          • Vitim Plateau
    Mineral and/or Locality
    Google
     
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