Ezcurrite Mineral Data

General Ezcurrite Information

Chemical Formula:

Na4B10O17•7(H2O)

Composition:

Molecular Weight = 598.16 gm

Sodium 15.37 % Na 20.72 % Na₂O

Boron 18.07 % B 58.19 % B₂O₃

Hydrogen 2.36 % H 21.08 % H₂O

Oxygen 64.19 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₄B₁₀O₁₇•7(H₂O)

Environment:

Probably formed from solutions derived from dehydration of borax in a discordant deposit in folded playa siltstones and sandstones.

IMA Status:

Valid Species (Pre-IMA) 1957

Locality:

Tincalayu borax deposit, Salar del Hombre Muerto, Salta Province, Argentina. Link to MinDat.org Location Data.

Name Origin:

Named for Juan Manuel de Ezcurra (1900-1970), Manager of the Compania Productora de Boratos, S.A., owner of the Tincalayu deposit, Argentina.

Name Pronunciation:

Ezcurrite + Pronunciation

Synonym:

ICSD 10278

PDF 20-1084

Ezcurrite Image

Images:

Ezcurrite

Comments: Translucent white crystalline massive ezcurrite.
Location: Tincalaya, Salta, Argentina. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ezcurrite Crystallography

Axial Ratios:

a:b:c =0.8984:1:0.6871

Cell Dimensions:

a = 8.598, b = 9.57, c = 6.576, Z = 1; alpha = 102.75°, beta = 107.5°, gamma = 71.5° V = 477.31 Den(Calc)= 2.08

Crystal System:

Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 6.931(1), 3.079(0.38), 3.091(0.38),

Physical Properties of Ezcurrite

Cleavage:

{110} Perfect, {010} Good

Color:

Colorless.

Density:

2.053

Diaphaneity:

Transparent

Hardness:

3-3.5 - Calcite-Copper Penny

Luster:

Vitreous - Silky

Streak:

white

Optical Properties of Ezcurrite

Gladstone-Dale:

CI meas= -0.034 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.035 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2446,KPDmeas= 0.2442,KC= 0.2362
Ncalc = 1.48

Optical Data:

Biaxial (-), a=1.468, b=1.507, g=1.529, bire=0.0610, 2V(Calc)=72, 2V(Meas)=73.5.

Calculated Properties of Ezcurrite

Electron Density:

Bulk Density (Electron Density)=2.06 gm/cc
note: Specific Gravity of Ezcurrite =2.05 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_Ezcurrite= 0.50 barns/electron
U=PE_Ezcurrite x rElectron Density= 1.04 barns/cc.

Radioactivity:

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

Ezcurrite Classification

Dana Class:

26.05.05.01 (26)Hydrated Borates Containing Hydroxyl or Halogen

(26.05)Dana Type

(26.05.05)Dana Group

26.05.05.01 Ezcurrite Na4B10O17•7(H2O) P1 1

Strunz Class:

06.EB.10 06 - BORATES

06.E - Pentaborates

06.EB -Ino-pentaborates

06.EB.10 Ezcurrite Na4B10O17•7(H2O) P1 1

Other Ezcurrite Information

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Ezcurrite :
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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Print or Cut-and-Paste your Ezcurrite Specimen Label here :

Ezcurrite

Na4B10O17•7(H2O)
Dana No: 26.05.05.01 Strunz No: 06.EB.10
Locality:

Notes:

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