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Chinleite-(Y)

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Formula:
NaY(SO4)2 · H2O
Colour:
Colourless
Lustre:
Vitreous
Hardness:
2½ - 3
Specific Gravity:
3.385 (Calculated)
Crystal System:
Trigonal
Name:
Named for the Chinle Formation that includes the type locality of the Blue Lizard mine, and for the dominant REE, yttrium.
Structurally related to bassanite; contains irregular NaO8 polyhedra and distorted YO9 tri-capped prisms.


Well known as a synthetic compound. The most simple natural Y-rich sulphate mineral (compare, e.g., levinsonite-(Y), chukhrovite-(Y), sejkoraite-(Y), ...).



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Classification of Chinleite-(Y)Hide

Approved
Approval Year:
2016
First Published:
2017

Physical Properties of Chinleite-(Y)Hide

Vitreous
Transparency:
Transparent
Colour:
Colourless
Streak:
White
Hardness:
2½ - 3 on Mohs scale
Hardness Data:
Measured
Tenacity:
Brittle
Cleavage:
Distinct/Good
Good parallel to [001], probably {100}
Fracture:
Splintery
Density:
3.385 g/cm3 (Calculated)

Optical Data of Chinleite-(Y)Hide

Type:
Uniaxial (+)
RI values:
nω = 1.565() nε = 1.603(1)
Max Birefringence:
δ = 0.038
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of Chinleite-(Y)Hide

Formula:
NaY(SO4)2 · H2O

Crystallography of Chinleite-(Y)Hide

Crystal System:
Trigonal
Class (H-M):
3 2 - Trapezohedral
Cell Parameters:
a = 6.890(2) Å, c = 12.767(2) Å
Ratio:
a:c = 1 : 1.853
Unit Cell V:
524.9 ų
Z:
3
Comment:
R3221

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
6.01(59)
5.43(63)
3.457(46)
3.010(100)
2.826(95)
2.1365(39)
1.8493(67)
1.6901(28)

Type Occurrence of Chinleite-(Y)Hide

General Appearance of Type Material:
Thin, hexagonal {100} prisms, up to 0.3 mm, having pyramidal terminations consisting of the {101} and {011} forms; spray-like intergrowths and bow-tie aggregates were observed
Place of Conservation of Type Material:
Natural History Museum of Los Angeles County, Los Angeles, California, USA (65632, 65633, and 65634).
Empirical Formula of Type Material:
(Na0.507Ca0.285Y0.1760.968(Y0.724Dy0.110Σr0.053Gd0.037Ho0.021Yb0.013Nd0.014Σu0.005Sm0.008Ce0.010Pr0.003La0.0021.000(SO4)2·H1.401O
Geological Setting of Type Material:
Secondary alteration mineral
Associated Minerals at Type Locality:
Reference:
Kampf, A.R., Nash, B.P., Marty, J. (2017) Chinleite-(Y), NaY(SO4)2·H2O, a new rare-earth sulfate mineral structurally related to bassanite. Mineralogical Magazine: 81: 909-916.

Synonyms of Chinleite-(Y)Hide

Fluorescence of Chinleite-(Y)Hide

Nonfluorescent

Other InformationHide

Notes:
Slowly soluble in water at room temperature.
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 Chinleite-(Y)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Yanhua Song, Haifeng Zou, Ye Sheng, Keyan Zheng, and Hongpeng You (2011) 3D Hierarchical Architectures of Sodium Lanthanide Sulfates: Hydrothermal Synthesis, Formation Mechanisms, and Luminescence Properties. Journal of Physical Chemistry C: 115: 19463–19469.
Kampf, A.R., Nash, B.P. and Marty, J. (2016) Chinleite-(Y), IMA 2016-017. CNMNC Newsletter No. 32, August 2016, page 916. Mineralogical Magazine, 80: 915–922.
Kampf, A.R., Nash, B.P., Marty, J. (2017) Chinleite-(Y), NaY(SO4)2·H2O, a new rare-earth sulfate mineral structurally related to bassanite. Mineralogical Magazine: 81: 909-916.

Internet Links for Chinleite-(Y)Hide

Localities for Chinleite-(Y)Hide

ⓘ - 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.
USA (TL)
 
  • Utah
    • San Juan Co.
      • White Canyon District
        • Red Canyon
Kampf, A.R., Nash, B.P. and Marty, J. (2016) Chinleite-(Y), IMA 2016-017. CNMNC Newsletter No. 32, August 2016, page 916; Mineralogical Magazine, 80: 915–922; Kampf, A.R., Nash, B.P. and Marty, J. (2016) Chinleite-(Y), IMA 2016-017. CNMNC Newsletter No. 32, August 2016, page 916; Mineralogical Magazine, 80: 915–922
Mineral and/or Locality  
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