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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[BO
 
4
]
6.AC.10Pseudosinhalite
Mg
 
2
Al
 
3
[O
 
3
|OH|(BO
 
3
)
 
2
]
6.AC.15Behierite
(Ta
5+
 
,Nb
5+
 
)[BO
 
4
]
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)
 
4
|[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).

Internet Links for Teepleite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Teepleite in the Natural History Museum (London) online catalogue
  • 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.
    (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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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 7th Nov 2009 11:55:00