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Inderborite

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Inder B deposit and salt dome, Atyrau (Gur'yev), Atyrau Oblysy (Atyrau Oblast'), Kazakhstan
© Peter Kohorst

Show Inderborite Photos (3)
Formula:
CaMg(H
 
3
B
 
3
O
 
7
)
 
2
 · 8H
 
2
O
System:MonoclinicColour:Colourless to white
Hardness:3½
Name:After the type locality, INDER Lake, Kazakhstan, plus in allusion to its composition, being a BORate.
This page provides mineralogical data about Inderborite.

Classification of Inderborite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:5/H.06-30
Nickel-Strunz 10th (pending) edition ID:6.CA.25

6 : BORATES
C : Triborates
A : Neso-triborates
Dana 8th edition ID:26.3.1.2

26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
3 : Triborates
Hey's CIM Ref.:9.3.23

9 : Borates
3 : Borates of Ca and Sr
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Type Occurrence of Inderborite

Type Locality:Deposit No. 6, Inder B deposit and salt dome, Atyrau (Gur'yev), Atyrau Oblysy (Atyrau Oblast'), Kazakhstan
Year of Discovery:1940
Geological Setting of type material:Borate deposit.
Associated Minerals at type locality:
UlexiteSzaibélyiteInyoiteColemanite

Physical Properties of Inderborite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:Colourless to white
Streak:White
Hardness (Mohs):3½
Cleavage:Distinct/Good
On {100} good.
Fracture:Conchoidal
Density (measured):2 g/cm3

Crystallography of Inderborite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Cell Parameters:a = 12.13Å, b = 7.43Å, c = 19.23Å
β = 90.29°
Ratio:a:b:c = 1.633 : 1 : 2.588
Unit Cell Volume:V 1,733.10 ų (Calculated from Unit Cell)
Morphology:Crystals to 2 cm. Coarsely crystalline aggregates.

Optical Data of Inderborite

Type:Biaxial (-)
RI values: nα = 1.482 nβ = 1.512 nγ = 1.530
2V:Measured: 77° , Calculated: 74°
Maximum Birefringence:δ = 0.048

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:none

Chemical Properties of Inderborite

Formula:
CaMg(H
 
3
B
 
3
O
 
7
)
 
2
 · 8H
 
2
O
Essential elements:B, Ca, H, Mg, O
All elements listed in formula:B, Ca, H, Mg, O

Relationship of Inderborite 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.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.40Solongoite
Ca
 
2
(H
 
3
B
 
3
O
 
7
)(OH)Cl
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:

- +
9.3.1Calciborite
Ca[B
 
2
O
 
4
]
9.3.2Sibirskite
Ca
 
2
[B
 
2
O
 
5
] · H
 
2
O
9.3.3Fabianite
CaB
 
3
O
 
5
OH
9.3.4Uralborite
Ca
 
2
[B
 
3
O
 
3
(OH)
 
5
·OB(OH)
 
3
]
9.3.5Vimsite
CaB
 
2
O
 
2
(OH)
 
4
9.3.6Olshanskyite
Ca
 
3
[OH|{B(OH)
 
4
}
 
2
]
 
2
9.3.7Frolovite
Ca[B(OH)
 
4
]
 
2
9.3.8Korzhinskite
CaB
 
2
O
 
4
·H
 
2
O
9.3.9Tyretskite
Ca
 
2
B
 
5
O
 
9
OH·H
 
2
O
9.3.10Nifontovite
CaB
 
2
O
 
4
·2.3H
 
2
O
9.3.12Inyoite
Ca(H
 
4
B
 
3
O
 
7
)(OH) · 4H
 
2
O
9.3.13Gowerite
Ca[B
 
5
O
 
8
(OH)][B(OH)
 
3
]·3H
 
2
O
9.3.14Colemanite
Ca[B
 
3
O
 
4
(OH)
 
3
] · H
 
2
O
9.3.15Pentahydroborite
CaB
 
2
O(OH)
 
6
 · 2H
 
2
O
9.3.16Hexahydroborite
Ca[B(OH)
 
4
]
 
2
 · 6H
 
2
O
9.3.17Meyerhofferite
Ca
 
2
(H
 
3
B
 
3
O
 
7
)
 
2
 · 4H
 
2
O
9.3.18Priceite
Ca
 
2
B
 
5
O
 
7
(OH)
 
5
·H
 
2
O
9.3.19Ginorite
Ca
 
2
B
 
14
O
 
23
·8H
 
2
O
9.3.20Probertite
NaCaB
 
5
O
 
7
(OH)
 
4
·3H
 
2
O
9.3.21Ulexite
NaCa[B
 
5
O
 
6
(OH)
 
6
] · 5H
 
2
O
9.3.22Hydroboracite
CaMg[B
 
3
O
 
4
(OH)
 
3
]
 
2
 · 3H
 
2
O
9.3.24Wardsmithite
Ca
 
5
Mg[B
 
4
O
 
7
]
 
6
 · 30H
 
2
O
9.3.25Henmilite
Ca
 
2
Cu[(OH)
 
2
|B(OH)
 
4
]
 
2
9.3.26Strontioborite
SrB
 
8
O
 
11
(OH)
 
4
9.3.27Veatchite
Sr
 
2
B
 
11
O
 
16
(OH)
 
5
·H
 
2
O
9.3.28Veatchite-A
Sr
 
2
B
 
11
O
 
16
(OH)
 
5
·H
 
2
O
9.3.29 P-Veatchite
9.3.30 Balavinskite
Sr
 
2
B
 
6
O
 
11
·4H
 
2
O
9.3.31Tunellite
SrB
 
6
O
 
9
(OH)
 
2
·3H
 
2
O
9.3.32Strontioginorite
(Sr,Ca)
 
2
B
 
14
O
 
23
·8H
 
2
O

Other Names for Inderborite

Synonyms:
Metahydroboracite
Other Languages:
German:Inderborit
Russian:Индерборит
Spanish:Inderborita

Other Information

Other Information:Slowly soluble in cold water. Rapidly soluble in hot HCl.
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 Inderborite

Reference List:Gorshov (1941) Comptes rendus de l’académie des sciences de l’U.R.S.S., n.s.: 33: 254.

Ikornikova and Godlevsky (1941) Comptes rendus de l’académie des sciences de l’U.R.S.S., n.s.: 33: 257 (as Metahydroboracite).

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 355-356.

Canadian Mineralogist (1994): 32: 533-539.

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

Articles/Blogs about Inderborite

Internet Links for Inderborite

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    Localities for Inderborite

    Hide Locality List
    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.
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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.
    Kazakhstan
     
    • Atyrau Oblysy (Atyrau Oblast')
      • Atyrau (Gur'yev)
    		[Clark, 1993 - "Hey's Mineral Index", p322]
    Turkey
     
    • Central Anatolia Region
      • Eskisehir Province
    		CAHIT HELVACI & RICARDO N. ALONSO (2000) Borate Deposits of Turkey and Argentina; A Summary and Geological Comparison. Turkish Journal of Earth Sciences, Vol. 9, 2000, pp. 1-27
      • Yozgat Province
    		http://www.mineralienatlas.de/lexikon/index.php/T%FCrkei/Eskisehir/Kirka/Sarikaya
    Mineral and/or Locality
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