Ezcurrite Mineral Data

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)

IMA Status:

Valid Species (Pre-IMA) 1957

Locality:

Link to MinDat.org Location Data.

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 - PinacoidalH-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),

Crystal Structure:

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Cannillo E , Dal Negro A , Ungaretti L , American Mineralogist , 58 (1973) p.110-115, The crystal structure of ezcurrite

Physical Properties of Ezcurrite

Cleavage:

[110] Perfect, [010] Good

Color:

Colorless.

Density:

2.053

Diaphaniety:

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= -0.021 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.241,KPDmeas= 0.2442,KC= 0.2362

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:

r_electron=2.09 gm/cc
note: r_Ezcurrite=2.08 gm/cc.

Fermion Index

Fermion Index = 0.03627
Boson Index = 0.96373

Photoelectric:

PE_Ezcurrite= 0.50 barns/electron
U=PE_Ezcurrite x r_electron= 1.05 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Ezcurrite is Not Radioactive

Ezcurrite Classification

Dana Class:

26.5.5.1 (26)Hydrated Borates Containing Hydroxyl or Halogen

(26.5)Dana Type

(26.5.5)Dana Group

26.5.5.1 Ezcurrite Na4B10O17·7(H2O) P1 1

Strunz Class:

V/J.05-20 V - Nitrates, Carbonates and Borates

V/J - Chain borates with [B2O4]2- to [B6O10]2-

V/J.05 - Larderellite - Kaliborite series

V/J.05-10 Larderellite (NH4)B5O6(OH)4 P 2₁/a 2/m

V/J.05-20 Ezcurrite Na4B10O17·7(H2O) P1 1

V/J.05-30 Probertite NaCaB5O7(OH)4·3(H2O) P 2₁/a 2/m

V/J.05-40 Kaliborite KHMg2B12O16(OH)10·4(H2O) C 2/c 2/m

Other Ezcurrite Information

References:

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 -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 Ezcurrite Specimen Label here :

Ezcurrite

Na4B10O17·7(H2O)
Dana No: 26.5.5.1 Strunz No: V/J.05-20
Locality:

Notes: