Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Mineral Chatroom The Mindat Store

Ezcurrite

This page is currently not sponsored. Click here to sponsor this page.
Big Photo

Tincalayu Mine, Salar Del Hombre Muerto, Salta, Argentina
© Simone Citon

Show Ezcurrite Photos (5)



Formula:
Na
 
4
B
 
10
O
 
17
 · 7H
 
2
O
System:TriclinicColour:Colorless
Hardness:3 - 3½
Name:For Juan Manuel de Ezcurra (1900-1970), manager of the Compania Productora de Boratos SA
This page provides mineralogical data about Ezcurrite.

Classification of Ezcurrite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:5/J.05-20
Nickel-Strunz 10th (pending) edition ID:6.EB.10

6 : BORATES
E : Pentaborates
B : Ino-pentaborates
Dana 8th edition ID:26.5.5.1

26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
5 : Pentaborates
Hey's CIM Ref.:9.1.7

9 : Borates
1 : Borates of the alkalis and boric acid
mindat.org URL:http://www.mindat.org/min-1431.html
Please feel free to link to this page.

Type Occurrence of Ezcurrite

Type Locality:Tincalayu Mine, Salar Del Hombre Muerto, Salta, Argentina
Year of Discovery:1957
Geological Setting of type material:Playa

Physical Properties of Ezcurrite

Lustre:Vitreous, Silky
Diaphaneity (Transparency):Transparent
Colour:Colorless
Hardness (Mohs):3 - 3½
Tenacity:Brittle
Cleavage:Perfect
Excellent on {110}, good on {100}, fair {126}, poor on {110}{101}
Density (measured):2.053 g/cm3
Density (calculated):2.049 g/cm3

Crystallography of Ezcurrite

Crystal System:Triclinic
Class (H-M):1 - Pinacoidal
Space Group:P1
Cell Parameters:a = 8.598(2) Å, b = 9.570(2) Å, c = 6.576(2) Å
α = 102.75°, β = 107.5°, γ = 71.51°
Ratio:a:b:c = 0.898 : 1 : 0.687
Unit Cell Volume:V 484.69 ų (Calculated from Unit Cell)
Z:1
Morphology:Bladed to fibrous prismatic crystals.

Optical Data of Ezcurrite

Type:Biaxial (-)
RI values: nα = 1.468 nβ = 1.507 nγ = 1.529
2V:Measured: 73° , Calculated: 72°
Maximum Birefringence:δ = 0.061

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:relatively weak r > v

Chemical Properties of Ezcurrite

Formula:
Na
 
4
B
 
10
O
 
17
 · 7H
 
2
O
Essential elements:B, H, Na, O
All elements listed in formula:B, H, Na, O

Relationship of Ezcurrite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
6.EB.05Larderellite
(NH
 
4
)B
 
5
O
 
6
(OH)
 
4
6.EB.15Probertite
NaCaB
 
5
O
 
7
(OH)
 
4
 · 3H
 
2
O
6.EB.20Tertschite
Ca
 
4
B
 
10
O
 
19
 · 20H
 
2
O
6.EB.25Priceite
Ca
 
2
B
 
5
O
 
7
(OH)
 
5
 · H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
9.1.1Sassolite
H
 
3
BO
 
3
9.1.2Metaborite
HBO
 
2
9.1.3Diomignite
Li
 
2
[B
 
4
O
 
7
]
9.1.4Biringuccite
Na
 
2
B
 
5
O
 
8
(OH) · H
 
2
O
9.1.5Nasinite
Na
 
4
B
 
10
O
 
17
 · 5H
 
2
O
9.1.6Kernite
Na
 
2
[B
 
4
O
 
6
(OH)
 
2
] · 3H
 
2
O
9.1.8Tincalconite
Na
 
2
(B
 
4
O
 
7
) · 5H
 
2
O
9.1.9Borax
Na
 
2
(B
 
4
O
 
5
)(OH)
 
4
 · 8H
 
2
O
9.1.10Ameghinite
Na(H
 
4
B
 
3
O
 
7
)
9.1.11Sborgite
Na[B
 
5
O
 
6
(OH)
 
4
] · 3H
 
2
O
9.1.12Aristarainite
Na
 
2
MgB
 
12
O
 
20
 · 8H
 
2
O
9.1.13Santite
K[B
 
5
O
 
6
(OH)
 
4
] · 2H
 
2
O
9.1.14Larderellite
(NH
 
4
)B
 
5
O
 
6
(OH)
 
4
9.1.15Ammonioborite
(NH
 
4
)
 
2
[B
 
5
O
 
6
(OH)
 
4
]
 
2
 · H
 
2
O
9.1.16Rhodizite
(K,Cs)Al
 
4
Be
 
4
(B,Be)
 
12
O
 
28

Other Names for Ezcurrite

Other Languages:
German:Ezcurrit
Russian:Эзкуррит
Spanish:Ezcurrita

Other Information

Other Information:Soluble in water
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Ezcurrite

Reference List:

- +
Muessig, S. & R.D. Allen (1957), Ezcurrite (2Na2O·7H2O), a new sodium borate from Argentina; occurrence, mineralogy, and associated minerals, Economic Geology: 52: 426-437.

American Mineralogist (1957): 42: 919.

American Mineralogist (1973): 58: 110-115.

Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for Ezcurrite

Search Engines:
  • Look for Ezcurrite on Google
  • Look for Ezcurrite images on Google
    • External Links:
  • Look for Ezcurrite on Webmineral
  • Look for Ezcurrite on Athena Mineralogy
  • Look for Ezcurrite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Ezcurrite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Find Ezcurrite on www.crystalclassics.co.uk
  • Search for Ezcurrite from all mineral dealers at minfind.com
  • Edwards Minerals - Fine Specimens
  • By minerals from YourMineralCollection
  • Fabre Minerals - search for Ezcurrite specimens
  • High-end worldwide specimens & outstanding customer service
  • SpiriferMinerals.com - high quality low prices
  • webminerals
  • Buy RARE Minerals from Rocks of Africa
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Buy from David K Joyce minerals
  • Rare and Unusual minerals at Mineralogical Research Company
    • Jobs:
  • Mining & Geology Jobs

    • Localities for Ezcurrite

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Argentina
     
    • Salta
      • Salar Del Hombre Muerto
    		Am Min 52 (1967), 1048; Am Min 58:308-313
    Mineral and/or Locality
    Search Google
     
    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 18th Jun 2011 09:50:00
    Mineral and Locality Search
    Mineral:
    and/or Locality:
    Options
    Fade toolbar when not in focusFix toolbar to bottom of page
    Hide Social Media Links
    Slideshow frame delay seconds