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Nashite

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Formula:
Na3Ca2[(V95+V4+)O28] · 24H2O
System:
Monoclinic
Colour:
Bluish-green
Hardness:
2
Name:
Named in honour of Dr. Barbara P. Nash (b. 1944), Professor of Geology and Geophysics at the University of Utah.
This page provides mineralogical data about Nashite.

Classification of Nashite

Approved 2012
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http://www.mindat.org/min-42727.html
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First Recorded Occurrence of Nashite

General Appearance of First Recorded Material:
Blades on a corvusite-montroseite-bearing sandstone block
Place of Conservation of First Recorded Material:
Natural History Museum of Los Angeles County, Los Angeles, California, USA, catalogue numbers 63583 (holotype) and 63584 (Little Eva mine), and 63585, 63586 and 63587 (St Jude mine)
Geological Setting of First Recorded Material:
Sandstone
Associated Minerals at First Recorded Locality:

Physical Properties of Nashite

Sub-Adamantine
Diaphaneity (Transparency):
Transparent
Colour:
Bluish-green
Streak:
Light bluish-green
Hardness (Mohs):
2
Comment:
ca.2
Tenacity:
Brittle
Cleavage:
Distinct/Good
One good cleavage on {010}
Density:
2.350 g/cm3 (Calculated)
Comment:
Calculated: based on the empirical formula and single-crystal cell data

Crystallography of Nashite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Space Group Setting:
P21/m
Cell Parameters:
a = 10.0099(3) Å, b = 21.8472(7) Å, c = 11.1504(7) Å
β = 116.584(8)°
Ratio:
a:b:c = 0.458 : 1 : 0.51
Unit Cell Volume:
V 2,180.67 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction Data:
d-spacingIntensity
10.995 (46)
9.044 (100)
8.350 (64)
6.962 (15)
5.526 (17)
3.501 (15)
2.994 (13)
2.652 (15)

Optical Data of Nashite

Type:
Biaxial (-)
RI values:
nα = 1.737(3) nβ = 1.762(6) nγ = 1.775(3)
2V:
Measured: 70° , Calculated: 71°
Max Birefringence:
δ = 0.038
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
High
Pleochroism:
Visible
Comments:
With X greenish blue, Y yellowish green, and Z yellow, with X > Y >> Z.

Chemical Properties of Nashite

Formula:
Na3Ca2[(V95+V4+)O28] · 24H2O
Essential elements:
All elements listed in formula:
Analytical Data:
Empirical formula based on O = 52 (electron probe microanalysis)
Empirical Formula:
(Na3.063K0.007)Σ3.070(Ca1.984Sr0.039)Σ2.019<(V4+V5+9)O28>•24(H1.995O) ·

Other Names for Nashite

Name in Other Languages:

Other Information

Does not fluoresce in short- or long-wave ultraviolet radiation
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 Nashite

Reference List:
Kampf, A.R., Hughes, J.M., Marty, J., Brown, F. (2012) Nashite, IMA 2011-105. CNMNC Newsletter No. 13, June 2012, page 810; Mineralogical Magazine, 76, 807-817.

Kampf, A.R., Hughes, J.M., Marty, J. and Brown, F. H. (2013): Nashite, Na3Ca2[(V4+V5+9)O28]•24H2O, a new mineral species from the Yellow Cat Mining District, Utah and the Slick Rock Mining District, Colorado: Crystal structure and descriptive mineralogy. Canadian Mineralogist, 51, 27-38.

Internet Links for Nashite

Localities for Nashite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
USA
 
  • Colorado
    • San Miguel Co.
      • Slick Rock District
        • Gypsum Valley
Kampf, A.R., Hughes, J.M., Marty, J., Brown, F. (2012) Nashite, IMA 2011-105. CNMNC Newsletter No. 13, June 2012, page 810; Mineralogical Magazine, 76, 807-817; Kampf, A.R., Hughes, J.M., Marty, J. and Brown, F. H. (2013): Nashite, Na3Ca2[(V4+V5+9)O28]•24H2O, a new mineral species from the Yellow Cat Mining District, Utah and the Slick Rock Mining District, Colorado: Crystal structure and descriptive mineralogy. Canadian Mineralogist, 51, 27-38.
  • Utah
    • Grand Co.
      • Yellow Cat District (W. part of Thompsons District)
Kampf, A.R., Hughes, J.M., Marty, J., Brown, F. (2012) Nashite, IMA 2011-105. CNMNC Newsletter No. 13, June 2012, page 810; Mineralogical Magazine, 76, 807-817; Kampf, A.R., Hughes, J.M., Marty, J. and Brown, F. H. (2013): Nashite, Na3Ca2[(V4+V5+9)O28]•24H2O, a new mineral species from the Yellow Cat Mining District, Utah and the Slick Rock Mining District, Colorado: Crystal structure and descriptive mineralogy. Canadian Mineralogist, 51, 27-38.
Mineral and/or Locality  
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