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Teepleite

Big Photo

Borax Lake, Clear Lake, Clear Lake Oaks, Lake Co., California, USA
© 2008, J. Weissman

Formula:
Na
 
2
[Cl|B(OH)
 
4
]
System:TetragonalColour:Colourless, white, light ...
Lustre:Vitreous, Greasy, DullHardness:3 - 3½
Name:Named after John Edgar Teeple (1874-1931), chemist, for his contributions to the mineral chemistry of Searles Lake, California (USA)
This page provides mineralogical data about Teepleite.

Classification of Teepleite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:5/G.08-20
Nickel-Strunz 10th (pending) edition ID:6.AC.40

6 : BORATES
A : Monoborates
C : B(O,OH)4, without and with additional anions; 1(T), 1(T)+OH, etc
Dana 8th edition ID:25.1.4.1

25 : ANHYDROUS BORATES CONTAINING HYDROXYL OR HALOGEN
1 : Monoborates
Hey's CIM Ref.:10.1.1

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

Type Locality:Searles Lake, San Bernardino Co., California, USA
Year of Discovery:1938
Geological Setting of type material:Residual brine in a lacustrine evaporite deposit after a period of extreme dessication.
Associated Minerals at type locality:
TronaHalite

Physical Properties of Teepleite

Lustre:Vitreous, Greasy, Dull
Diaphaneity (Transparency):Transparent, Translucent
Colour:Colourless, white, light beige; colourless in transmitted light
Streak:White
Hardness (Mohs):3 - 3½
Tenacity:Very brittle
Fracture:Irregular/Uneven, Sub-Conchoidal
Density (measured):2.076 g/cm3
Density (calculated):2.07 g/cm3

Crystallography of Teepleite

Crystal System:Tetragonal
Class (H-M):4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:P4/nmm (P4/n 21/m 2/m)
Cell Parameters:a = 7.25Å, c = 4.84Å
Ratio:a:c = 1 : 0.668
Unit Cell Volume:V 254.40 ų (Calculated from Unit Cell)
Morphology:Crystals tabular {001}. Crystals commonly rounded into cushion-shaped or lens-like forms and are often aggregated into interpenetrating groups.

Optical Data of Teepleite

Type:Uniaxial (-)
RI values: nω = 1.519 nε = 1.503
Maximum Birefringence:δ = 0.016

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

Chemical Properties of Teepleite

Formula:
Na
 
2
[Cl|B(OH)
 
4
]
Idealised Formula:
Na
 
2
Cl[B(OH)
 
4
]
Essential elements:B, Cl, H, Na, O
All elements listed in formula:B, Cl, H, Na, O

Relationship of Teepleite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
6.AC.05Sinhalite
MgAl[O|BO
 
3
]
6.AC.10Pseudosinhalite
Mg
 
2
Al
 
3
[O
 
3
|OH|(BO
 
3
)
 
2
]
6.AC.15Behierite
(Ta
5+
 
,Nb
5+
 
)[O|BO
 
3
]
6.AC.15Schiavinatoite
(Nb,Ta)BO
 
4
6.AC.20Frolovite
Ca[B(OH)
 
4
]
 
2
6.AC.25Hexahydroborite
Ca[B(OH)
 
4
]
 
2
 · 6H
 
2
O
6.AC.30Henmilite
Ca
 
2
Cu[(OH)
 
2
|B(OH)
 
4
]
 
2
6.AC.35Bandylite
Cu[Cl|B(OH)
 
4
]
6.AC.45Moydite-(Y)
Y[CO
 
3
|B(OH)
 
4
]
6.AC.50Carboborite
Ca
 
2
Mg[CO
 
3
|B(OH)
 
4
]
 
2
 · 4H
 
2
O
6.AC.55Sulfoborite
Mg
 
3
[(OH,F)
 
2
|SO
 
4
|{B(OH)
 
4
}
 
2
]
6.AC.60Lüneburgite
Mg
 
3
B
 
2
(PO
 
4
)
 
2
(OH)
 
6
·6H
 
2
O
6.AC.65Seamanite
Mn
2+
3
[(OH)
 
2
|PO
 
4
|B(OH)
 
4
]
6.AC.70Cahnite
Ca
 
2
[AsO
 
4
|B(OH)
 
4
]
Related Minerals - Hey's Index Grouping:

- +
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
10.1.12Hydrochlorborite
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 Teepleite

Other Languages:
German:Teepleit
Russian:Типлеит
Spanish:Teepleita

Other Information

Other Information:Readily soluble in water, yielding an alkaline solution.
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 Teepleite

Reference List:Teeple (1929) The Industrial Development of Searles Lake Brines, New York: 130 (artificial material).

Gale, W.A., Foshag, and Vonsen (1939), Teepleite, a new mineral from Borax Lake, California, American Mineralogy: 24: 48-52.

Fornaseri, M. (1949), La struttura cristallina della teepleite. Periodico di Mineralogia (Roma), 103-124.

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: 372-373.

Acta Crystallographica (1982): B38: 82-85.

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

Articles/Blogs about Teepleite

Internet Links for Teepleite

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  • Raman and XRD data at RRUFF project
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  • Teepleite details from Handbook of Mineralogy (PDF)
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    Localities for Teepleite

    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.
    Ukraine
     
    • Zhytomyr Oblast' (Zhitomir Oblast')
    		No reference listed
    USA
     
    • California
      • Lake Co.
        • Clear Lake Oaks
          • Clear Lake
    		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: 373.
      • San Bernardino Co.
    		American Mineralogist (1939): 24: 48-52.
    Mineral and/or Locality
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