Teepleite Mineral Data

Teepleite Mineral Data +

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General Teepleite Information

Chemical Formula:

Na2B(OH)4Cl

Composition:

Molecular Weight = 160.27 gm

Sodium 28.69 % Na 38.67 % Na₂O

Boron 6.74 % B 21.72 % B₂O₃

Hydrogen 2.52 % H 22.48 % H₂O

Chlorine 22.12 % Cl 22.12 % Cl

- % Cl -4.99 % -O=Cl₂

Oxygen 39.93 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₂B(OH)₄Cl

Environment:

Continental evaporate deposits.

IMA Status:

Valid Species (Pre-IMA) 1939

Locality:

Borax lake, SE edge of Clear Lake, Lake Co., California. Link to MinDat.org Location Data.

Synonym:

ICSD 32518

PDF 12-Nov

Teepleite Image

Images:

Teepleite

Comments: Tan bladed crystals teepleite on massive halite.
Location: Borax Lake, Lake County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Teepleite Crystallography

Axial Ratios:

a:c = 1:0.66804

Cell Dimensions:

a = 7.26, c = 4.85, Z = 2; V = 255.63 Den(Calc)= 2.08

Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4/nmm

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.697(1), 2.015(0.9), 2.9(0.8),

Forms:

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Forms: [ 0 1 1] [ 1 1 0] [ 0 0 1]

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Physical Properties of Teepleite

Cleavage:

[???] Indistinct

Color:

Colorless, White.

Density:

2.076

Diaphaniety:

Transparent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Hardness:

3-3.5 - Calcite-Copper Penny

Luster:

Vitreous - Greasy

Streak:

white

Optical Properties of Teepleite

Gladstone-Dale:

CI meas= 0.076 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= 0.078 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2457,KPDmeas= 0.2461,KC= 0.2665

Optical Data:

Uniaxial (-), e=1.503, w=1.519, bire=0.0160.

Calculated Properties of Teepleite

Electron Density:

r_electron=2.07 gm/cc
note: r_Teepleite=2.08 gm/cc.

Fermion Index

Fermion Index = 0.01361
Boson Index = 0.98639

Photoelectric:

PE_Teepleite= 2.00 barns/electron
U=PE_Teepleite x r_electron= 4.14 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Teepleite is Not Radioactive

Teepleite Classification

Dana Class:

25.1.4.1 (25)Anhydrous Borates Containing Hydroxyl or Halogen

(25.1)Dana Type

(25.1.4)Dana Group

25.1.4.1 Teepleite Na2B(OH)4Cl P 4/nmm 4/m 2/m 2/m

25.1.4.2 Bandylite CuB(OH)4Cl P 4/nmm 4/m 2/m 2/m

Strunz Class:

V/G.08-20 V - Nitrates, Carbonates and Borates

V/G - "Insel" borates [BO4]5- tetraheders

V/G.08 - Bandylite - Cahnite

V/G.08-10 Bandylite CuB(OH)4Cl P 4/nmm 4/m 2/m 2/m

V/G.08-20 Teepleite Na2B(OH)4Cl P 4/nmm 4/m 2/m 2/m

V/G.08-30 Cahnite Ca2B(AsO4)(OH)4 I 4 4

Other Teepleite Information

References:

NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Teepleite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Print or Cut-and-Paste your Teepleite Specimen Label here :

Teepleite

Na2B(OH)4Cl
Dana No: 25.1.4.1 Strunz No: V/G.08-20
Locality:

Notes: