Tuzlaite Mineral Data

General Tuzlaite Information

Chemical Formula:

NaCaB508(0H)2•3(H2O)

Composition:

Molecular Weight = 333.17 gm

Sodium 6.90 % Na 9.30 % Na₂O

Calcium 12.03 % Ca 16.83 % CaO

Boron 16.22 % B 52.24 % B₂O₃

Hydrogen 2.42 % H 21.63 % H₂O

Oxygen 62.43 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

NaCaB₅O₈(OH)₂•3(H₂O)

Environment:

Saline evaporite deposit, as veins in dolomitic marl between salt layers.

IMA Status:

Approved IMA 1994

Locality:

Tuzla salt mine, Bosnia-Herzegovina. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Tuzlaite

Synonym:

ICSD 75289

IMA1993-022

PDF 47-1759

Tuzlaite Image

Images:

Tuzlaite

Comments: Prismatic colorless crystals of tuzlaite.
Location: Niedersachswerfen, Nordhausen, Harz Mts, Thuringia, Germany. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Tuzlaite Crystallography

Axial Ratios:

a:b:c =0.4899:1:0.8631

Cell Dimensions:

a = 6.506, b = 13.28, c = 11.462, Z = 4; beta = 92.97° V = 988.98 Den(Calc)= 2.24

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/c

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

By Intensity(I/I_o): 8.638(1), 6.617(0.29), 2.868(0.24),

Crystal Structure:

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Help on Above

Bermanec V , Armbruster T , Tibljas D , Sturman D , Kniewald G , American Mineralogist , 79 (1994) p.562-569, Tuzlaite, NaCa[B5O8(OH)2].3H2O, a new mineral with a pentaborate sheet, structure from the Tuzla salt mine, Bosnia and Hercegovina

Physical Properties of Tuzlaite

Cleavage:

{001} Perfect

Color:

Colorless, White.

Density:

2.21

Diaphaneity:

Transparent

Hardness:

2-3 - Gypsum-Calcite

Luster:

Silky - Pearly

Streak:

white

Optical Properties of Tuzlaite

Gladstone-Dale:

CI meas= -0.034 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.02 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2436,KPDmeas= 0.2469,KC= 0.2389
Ncalc = 1.53 - 1.54

Optical Data:

Biaxial (+), a=1.532, b=1.544, g=1.561, bire=0.0290, 2V(Calc)=82, 2V(Meas)=80.9-82.

Calculated Properties of Tuzlaite

Electron Density:

Bulk Density (Electron Density)=2.26 gm/cc
note: Specific Gravity of Tuzlaite =2.24 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_Tuzlaite= 1.82 barns/electron
U=PE_Tuzlaite x rElectron Density= 4.10 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Tuzlaite is Not Radioactive

Tuzlaite Classification

Dana Class:

26.05.12.02 (26)Hydrated Borates Containing Hydroxyl or Halogen

(26.05)Dana Type

(26.05.12)Dana Group

26.05.12.01 Probertite NaCaB5O7(OH)4•3(H2O) P 2₁/a 2/m

26.05.12.02 Tuzlaite NaCaB508(0H)2•3(H2O) P 2₁/c 2/m

Strunz Class:

06.EC.25 06 - BORATES

06.E - Pentaborates

06.EC -Phyllo-pentaborates

06.EC.25 Tuzlaite NaCaB508(0H)2•3(H2O) P 2₁/c 2/m

Other Tuzlaite Information

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Am.Min.,Vol.79,p562-569,1994) OPTIC PROP.(Am.Min.,Vol.79,p562-569,1994)

See Also:

Links to other databases for Tuzlaite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Ask about Tuzlaite here :
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Print or Cut-and-Paste your Tuzlaite Specimen Label here :

Tuzlaite

NaCaB508(0H)2•3(H2O)
Dana No: 26.05.12.02 Strunz No: 06.EC.25
Locality:

Notes: