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Currierite

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About CurrieriteHide

Formula:
Na4Ca3MgAl4(AsO3OH)12·9H2O
Lustre:
Vitreous, Silky
Hardness:
2
Specific Gravity:
3.08
Crystal System:
Hexagonal
Name:
The mineral is named in honour of Mr. Rock Henry Currier (1940-2015), mindat.org manager, mineral dealer, collector, author and lecturer.
A natural pure hydroxyarsenate, which is relatively rare.

Chemically resembles anatolyite. Structurally related to kaatialaite.


Classification of CurrieriteHide

Approved
Approval Year:
2016
First Published:
2017

Physical Properties of CurrieriteHide

Vitreous, Silky
Transparency:
Transparent
Streak:
White
Hardness:
Tenacity:
Brittle
Cleavage:
Distinct/Good
parallel [001]
Fracture:
Irregular/Uneven
Density:
3.08(2) g/cm3 (Measured)    3.005 g/cm3 (Calculated)

Optical Data of CurrieriteHide

Type:
Uniaxial (-)
RI values:
nω = 1.614() nε = 1.613(1)
Max Birefringence:
δ = 0.001
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of CurrieriteHide

Formula:
Na4Ca3MgAl4(AsO3OH)12·9H2O
IMA Formula:
Na4Ca3MgAl4(AsO3OH)12 · 9H2O

Crystallography of CurrieriteHide

Crystal System:
Hexagonal
Class (H-M):
6 2 2 - Trapezohedral
Space Group:
P6 2 2
Setting:
P6 2 2
Cell Parameters:
a = 12.2057(9) Å, c = 9.2057(7) Å
Ratio:
a:c = 1 : 0.754
Unit Cell V:
1187.7 ų
Z:
1
Morphology:
Hexagonal prisms, needles and hair-like fibres up to about 200 μm long, in sprays. Forms observed: {100} and {001}.
Comment:
The chain in the structure of currierite is identical to that in kaatialaite and a geometrical isomer of that in ferrinatrite.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
10.63(100)
6.12(20)
5.30(15)
4.61(24)
4.002(35)
3.474(29)
3.021(96)
1.523(29)

Occurrences of CurrieriteHide

Paragenetic Mode(s):
•  Oxidation

Type Occurrence of CurrieriteHide

General Appearance of Type Material:
Hexagonal prisms, needles and hair-like fibres up to about 200 μm long, in sprays
Place of Conservation of Type Material:
Mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA (catalogue numbers 66266 for holotype, and 64057 and 64080 for cotype)
Empirical Formula of Type Material:
(Na3.95Al2.96Ca2.74Mg1.28Fe3+0.63Cu0.13K0.08Co0.0311.80(As5+11.68Sb5+0.3212(O56.96Cl0.0457H30.81
Geological Setting of Type Material:
Secondary alteration phase
Associated Minerals at Type Locality:
Reference:
Kampf, A.R., Mills, S.J., Nash, Barbara P., Dini, M., Molina Donoso, A.A. (2017): Currierite, Na4Ca3MgAl4(AsO3OH)12·9H2O, a new acid arsenate with ferrinatrite-like heteropolyhedral chains from the Torrecillas mine, Iquique Province, Chile. Mineralogical Magazine: 81: 1141-1149.

Synonyms of CurrieriteHide

Other InformationHide

Notes:
The mineral is slowly soluble in dilute HCl 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 CurrieriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kampf, A.R., Mills, S.J., Nash, B., Dini, M. and Molina Donoso, A.A. (2016): Currierite, IMA 2016-030. CNMNC Newsletter No. 32, August 2016, page 920; Mineralogical Magazine: 80: 915–922
Kampf, A.R., Mills, S.J., Nash, Barbara P., Dini, M., Molina Donoso, A.A. (2017): Currierite, Na4Ca3MgAl4(AsO3OH)12·9H2O, a new acid arsenate with ferrinatrite-like heteropolyhedral chains from the Torrecillas mine, Iquique Province, Chile. Mineralogical Magazine: 81: 1141-1149.

Internet Links for CurrieriteHide

Localities for CurrieriteHide

ⓘ - 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.
Chile (TL)
 
  • Tarapacá Region
    • Iquique Province
      • Salar Grande
Kampf, A.R., Mills, S.J., Nash, B., Dini, M. and Molina Donoso, A.A. (2016): Currierite, IMA 2016-030. CNMNC Newsletter No. 32, August 2016, page 920; Mineralogical Magazine: 80: 915–922
Mineral and/or Locality  
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