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Tuzlaite

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About TuzlaiteHide

Formula:
NaCaB5O8(OH)2 · 3H2O
Colour:
White to colourless
Lustre:
Silky, Pearly
Hardness:
2 - 3
Specific Gravity:
2.21
Crystal System:
Monoclinic
Name:
Named after its discovery locality, Tuzla, Bosnia and Hercegovina.
Note: Some acicular gypsum from Niedersachswerfen has been erroneously sold as tuzlaite.


Classification of TuzlaiteHide

Approved
Approval Year:
1993
6.EC.25

6 : BORATES
E : Pentaborates
C : Phyllo-pentaborates
26.5.12.2

26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
5 : Pentaborates

Physical Properties of TuzlaiteHide

Silky, Pearly
Transparency:
Transparent
Colour:
White to colourless
Streak:
White
Hardness:
2 - 3 on Mohs scale
Cleavage:
Perfect
{001}
Density:
2.21 g/cm3 (Measured)    2.23 g/cm3 (Calculated)

Optical Data of TuzlaiteHide

Type:
Biaxial (+)
RI values:
nα = 1.532 nβ = 1.544 nγ = 1.561
2V:
Measured: 80° to 82°, Calculated: 82°
Max Birefringence:
δ = 0.029
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
weak

Chemical Properties of TuzlaiteHide

Formula:
NaCaB5O8(OH)2 · 3H2O
Common Impurities:
Sr,Al

Crystallography of TuzlaiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Cell Parameters:
a = 6.5 Å, b = 13.28 Å, c = 11.46 Å
β = 92.97°
Ratio:
a:b:c = 0.489 : 1 : 0.863
Unit Cell V:
987.90 ų (Calculated from Unit Cell)
Morphology:
prismatic and elongate to a

Type Occurrence of TuzlaiteHide

General Appearance of Type Material:
crosscutting veinlets in marl between halite layers
Place of Conservation of Type Material:
Croatian Museum of Natural History, Zagreb, Croatia
Geological Setting of Type Material:
Evaporite deposits
Associated Minerals at Type Locality:

Synonyms of TuzlaiteHide

Other Language Names for TuzlaiteHide

German:Tuzlait
Spanish:Tuzlaita

Related Minerals - Nickel-Strunz GroupingHide

6.EC.05BiringucciteNa2B5O8(OH) · H2OMon.
6.EC.05NasiniteNa2[B5O8(OH)] · 2H2OOrth.
6.EC.10GoweriteCa[B5O8(OH)][B(OH)3] · 3H2OMon.
6.EC.15P-VeatchiteSr2B11O16(OH)5 · H2O
6.EC.15VeatchiteSr2B11O16(OH)5 · H2OMon. m : Bb
6.EC.20VolkovskiteKCa4[B5O8OH]4[B(OH)3]2Cl · 4H2OTric. 1 : P1
6.EC.30HeidorniteNa2Ca3B5O8(SO4)2Cl(OH)2Mon.
6.EC.35BrianroulstoniteCa3[B5O6(OH)6](OH)Cl2 · 8H2OMon.

Related Minerals - Dana Grouping (8th Ed.)Hide

26.5.12.1ProbertiteNaCaB5O7(OH)4 · 3H2OMon. 2/m

Fluorescence of TuzlaiteHide

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for TuzlaiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Mineralogist (1994): 79: 562-569.
New Minerals (1997), New Minerals 1990-1994.
Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for TuzlaiteHide

Localities for TuzlaiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Bosnia and Herzegovina (TL)
 
  • Federation of Bosnia and Herzegovina
    • Tuzla Canton
      • Tuzla
American Mineralogist, volume 079, pp. 562-569(1994)
Germany
 
  • Thuringia
    • Harz
      • Nordhausen
        • Niedersachswerfen
Siemroth, J. (2008): Das Vorkommen von Boratmineralien im Werra-Anhydrit des Steinbruchs Kohnstein bei Niedersachswerfen am Südharz, Der Aufschluss, Vol. 59, 353-366
Mineral and/or Locality  
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