Teepleite
A valid IMA mineral species - grandfathered
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About Teepleite
John E. Teeple
Formula:
Na2[B(OH)4]Cl
Colour:
Colourless, white, light beige; colourless in transmitted light
Lustre:
Vitreous, Greasy, Dull
Hardness:
3 - 3½
Specific Gravity:
2.076
Crystal System:
Tetragonal
Name:
Named in honor of John Edgar Teeple (4 January 1874, Kempton, Illinois, U.S. - 28 May 1931, New York City, New York, U.S.), chemist, for his contributions to the knowledge of the mineral chemistry of Searles Lake, California. He also made significant contributions to the deciphering of Mayan glyphs.
This page provides mineralogical data about Teepleite.
Unique Identifiers
Mindat ID:
3901
Long-form identifier:
mindat:1:1:3901:3
IMA Classification of Teepleite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Na2B(OH)4Cl
First published:
1939
Classification of Teepleite
6.AC.40
6 : BORATES
A : Monoborates
C : B(O,OH)4, without and with additional anions; 1(T), 1(T)+OH, etc
6 : BORATES
A : Monoborates
C : B(O,OH)4, without and with additional anions; 1(T), 1(T)+OH, etc
25.1.4.1
25 : ANHYDROUS BORATES CONTAINING HYDROXYL OR HALOGEN
1 : Monoborates
25 : ANHYDROUS BORATES CONTAINING HYDROXYL OR HALOGEN
1 : Monoborates
10.1.1
10 : Borates with other anions
1 : Borates with halide
10 : Borates with other anions
1 : Borates with halide
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Tee | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Teepleite
Vitreous, Greasy, Dull
Transparency:
Transparent, Translucent
Colour:
Colourless, white, light beige; colourless in transmitted light
Streak:
White
Hardness:
3 - 3½ on Mohs scale
Tenacity:
Very brittle
Fracture:
Irregular/Uneven, Sub-Conchoidal
Density:
2.076 g/cm3 (Measured) 2.07 g/cm3 (Calculated)
Optical Data of Teepleite
Type:
Uniaxial (-)
RI values:
nω = 1.519 nε = 1.503
Max. Birefringence:
δ = 0.016
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
Surface Relief:
Moderate
Chemistry of Teepleite
Mindat Formula:
Na2[B(OH)4]Cl
Element Weights:
Crystallography of Teepleite
Crystal System:
Tetragonal
Class (H-M):
4/mmm(4/m2/m2/m) - Ditetragonal Dipyramidal
Space Group:
P4/nmm
Cell Parameters:
a = 7.25 Å, c = 4.84 Å
Ratio:
a:c = 1 : 0.668
Unit Cell 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. The only two forms observed in type material were {001} and {101}.
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0009750 | Teepleite | Effenberger H (1982) Verfeinerung der kristallstruktur von synthetischem teepleit Acta Crystallographica B38 82-85 |  | 1982 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.697 Å | (100) |
| 2.015 Å | (90) |
| 2.90 Å | (80) |
| 1.659 Å | (80) |
| 2.264 Å | (70) |
| 1.815 Å | (70) |
| 1.709 Å | (70) |
Comments:
XRD data for synthetic material.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 25 : Evaporites (prebiotic) |
Type Occurrence of Teepleite
General Appearance of Type Material:
Buff colored crusts and pseudomorphs after halite.
Place of Conservation of Type Material:
Harvard University, Cambridge, Massachusetts, USA 95832.
National Museum of Natural History, Washington, D.C., USA, 97449.
National Museum of Natural History, Washington, D.C., USA, 97449.
Geological Setting of Type Material:
Residual brine in a lacustrine evaporite deposit after a period of extreme dessication.
Associated Minerals at Type Locality:
Other Language Names for Teepleite
Common Associates
Associations Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 6.AC.05 | Sinhalite | MgAl(BO4) |
| 6.AC.10 | Pseudosinhalite | Mg2Al3(BO3)2(OH)O3 |
| 6.AC.15 | Béhierite | Ta(BO4) |
| 6.AC.15 | Schiavinatoite | Nb(BO4) |
| 6.AC.20 | Frolovite | Ca[B(OH)4]2 |
| 6.AC.25 | Hexahydroborite | Ca[B(OH)4]2 · 2H2O or CaB2O4 · 6H2O |
| 6.AC.30 | Henmilite | Ca2Cu[B(OH)4]2(OH)4 |
| 6.AC.35 | Bandylite | Cu[B(OH)4]Cl |
| 6.AC.45 | Moydite-(Y) | Y[B(OH)4](CO3) |
| 6.AC.50 | Carboborite | Ca2Mg[B(OH)4]2(CO3)2 · 4H2O |
| 6.AC.55 | Sulfoborite | Mg3[B(OH)4]2(SO4)(OH,F)2 |
| 6.AC.60 | Lüneburgite | Mg3[B2(OH)6](PO4)2 · 6H2O |
| 6.AC.65 | Seamanite | Mn2+3[B(OH)4](PO4)(OH)2 |
| 6.AC.70 | Cahnite | Ca2[B(OH)4](AsO4) |
Other Information
Notes:
Readily soluble in water, yielding an alkaline solution.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Teepleite
mindat.org URL:
https://www.mindat.org/min-3901.html
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References for Teepleite
Reference List:
Gale, W. A., Foshag, William F., Vonsen, M. (1939) Teepleite, a new mineral from Borax Lake, California. American Mineralogist, 24 (1). 48-52
Ross, V., Edwards, J. O. (1959) Notes and News: Tetrahedral boron in teepleite and bandylite. American Mineralogist, 44 (7-8). 875-877
Devarajan, V., Gräfe, E., Funck, E. (1974) Vibrational spectra of complex borates—II. B(OH)4−-ion in teepleite, Raman spectrum and normal coordinate analysis. Spectrochimica Acta Part A: Molecular Spectroscopy, 30 (6). 1235-1242 doi:10.1016/0584-8539(74)80107-8
Effenberger, H. (1982) Verfeinerung der Kristallstruktur von synthetischem Teepleit. Acta Crystallographica Section B Structural Crystallography and Crystal Chemistry, 38 (1) 82-85 doi:10.1107/s0567740882002106
Localities for Teepleite
Showing 3 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Ukraine | |
| Lyckberg et al. (2009) |
USA (TL) | |
| Bradley (1938) +5 other references |
| Gale et al. (1939) +4 other references |
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Borax Lake, Clear Lake Oaks, Sulphur Creek Mining District, Lake County, California, USA