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Amarillite

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About AmarilliteHide

Formula:
NaFe(SO4)2 · 6H2O
Colour:
Pale yellow with greenish tint.
Lustre:
Adamantine, Vitreous
Hardness:
2½ - 3
Specific Gravity:
2.19 - 2.2
Crystal System:
Monoclinic
Name:
For the type locality, Tierra Amarilla, near Copiapó, Chile.
The structure is based on octahedral–tetrahedral "sheets" comprising corner-sharing NaO4(H2O)2 octahedra and sulfate tetrahedra; their combination leads to a structural sheet, parallel to (001): [Na(SO4)2(H2O)2]3-. Interstitial Fe3+ cations and hydrogen bonds provide linkage of the sheets; Fe occurs in FeO2(H2O)4 octahedra; these octahedra are connected to the adjacent sheets by eight hydrogen bonds, that provides further stabilization of the structure.


Classification of AmarilliteHide

Approved, 'Grandfathered' (first described prior to 1959)
7.CC.75

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
C : With medium-sized and large cations
29.5.3.2

29 : HYDRATED ACID AND NORMAL SULFATES
5 : AB(XO4)2·xH2O
25.11.5

25 : Sulphates
11 : Sulphates of Fe and other metals

Physical Properties of AmarilliteHide

Adamantine, Vitreous
Transparency:
Transparent
Comment:
Brilliant, adamantine inclining toward vitreous.
Colour:
Pale yellow with greenish tint.
Hardness:
2½ - 3 on Mohs scale
Cleavage:
Distinct/Good
{110} difficult to develop.
Fracture:
Conchoidal
Density:
2.19 - 2.2 g/cm3 (Measured)    2.22 g/cm3 (Calculated)

Optical Data of AmarilliteHide

Type:
Biaxial (+)
RI values:
nα = 1.532(2) nβ = 1.555(3) nγ = 1.591(2)
Max Birefringence:
δ = 0.059
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
medium
Comments:
Large 2V

Chemical Properties of AmarilliteHide

Formula:
NaFe(SO4)2 · 6H2O
IMA Formula:
NaFe3+(SO4)2 · 6H2O

Crystallography of AmarilliteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Cell Parameters:
a = 8.419(61) Å, b = 10.8409(40) Å, c = 12.4717(50) Å
β = 95.495°
Ratio:
a:b:c = 0.777 : 1 : 1.15
Unit Cell V:
1,133.06 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Equant, complexly faceted crystals, thick tabular or rarely prismatic parallel [001], with common forms {001}, {100}, {110}, {101}, and {111}; as groupings of parallel individuals, to 2 mm.

Type Occurrence of AmarilliteHide

General Appearance of Type Material:
Veinlets in massive Coquimbite
Place of Conservation of Type Material:
National School of Mines, Paris, France, 133.69.
Associated Minerals at Type Locality:

Other Language Names for AmarilliteHide

German:Amarillit
Simplified Chinese:黄铁钠矾
Spanish:Amarillita

Common AssociatesHide

CoquimbiteAlFe3(SO4)6(H2O)12·6H2O

Related Minerals - Nickel-Strunz GroupingHide

7.CC.CobaltoblöditeNa2Co(SO4)2•4H2OMon. 2/m : P21/b
7.CC.AndychristyitePbCu2+Te6+O5(H2O)Tric. 1 : P1
7.CC.Ammoniovoltaite(NH4)2Fe2+5Fe3+3Al(SO4)12(H2O)18Iso. m3m (4/m 3 2/m) : Fd3c
7.CC.05KrausiteKFe(SO4)2 · H2OMon. 2/m : P21/m
7.CC.10TamarugiteNaAl(SO4)2 · 6H2OMon. 2/m
7.CC.15KaliniteKAl(SO4)2 · 11H2OMon. 2/m : B2/b
7.CC.15MendoziteNaAl(SO4)2 · 11H2OMon. 2/m
7.CC.20Lonecreekite(NH4)Fe3+(SO4)2 · 12H2OIso.
7.CC.20Alum-(K)KAl(SO4)2 · 12H2OIso. m3 (2/m 3) : Pa3
7.CC.20Alum-(Na)NaAl(SO4)2 · 12H2O
7.CC.20Tschermigite(NH4)Al(SO4)2 · 12H2OIso. m3 (2/m 3) : Pa3
7.CC.20LanmuchangiteTl+Al(SO4)2 · 12H2OIso. m3 (2/m 3) : Pa3
7.CC.25VoltaiteK2Fe2+5Fe3+3Al(SO4)12 · 18H2OIso. m3m (4/m 3 2/m) : Fd3c
7.CC.25ZincovoltaiteK2Zn5Fe3+3Al(SO4)12 · 18H2OIso. m3m (4/m 3 2/m) : Fd3c
7.CC.25PertlikiteK2(Fe2+,Mg)2Mg4Fe3+2Al(SO4)12 · 18H2OTet. 4/mmm (4/m 2/m 2/m) : I41/acd
7.CC.25Ammoniomagnesiovoltaite(NH4)2Mg2+5Fe3+3Al(SO4)12 · 18H2OIso. m3m (4/m 3 2/m) : Fd3c
7.CC.30KröhnkiteNa2Cu(SO4)2 · 2H2OMon. 2/m : P21/b
7.CC.35FerrinatriteNa3Fe(SO4)3 · 3H2OTrig. 3 : P3
7.CC.40GoldichiteKFe(SO4)2 · 4H2OMon. 2/m : P21/b
7.CC.45LöweiteNa12Mg7(SO4)13 · 15H2OTrig.
7.CC.50BlöditeNa2Mg(SO4)2 · 4H2OMon. 2/m
7.CC.50NickelblöditeNa2(Ni,Mg)(SO4)2 · 4H2O
7.CC.50ChangoiteNa2Zn(SO4)2 · 4H2OMon. 2/m : P21/b
7.CC.55LeoniteK2Mg(SO4)2 · 4H2OMon. 2/m
7.CC.55MereiteriteK2Fe(SO4)2 · 4H2OMon.
7.CC.60Boussingaultite(NH4)2Mg(SO4)2 · 6H2OMon. 2/m : P21/b
7.CC.60CyanochroiteK2Cu(SO4)2 · 6H2OMon. 2/m
7.CC.60Mohrite(NH4)2Fe(SO4)2 · 6H2OMon. 2/m : P21/b
7.CC.60Nickelboussingaultite(NH4)2Ni(SO4)2 · 6H2O
7.CC.60PicromeriteK2Mg(SO4)2 · 6H2OMon. 2/m
7.CC.65PolyhaliteK2Ca2Mg(SO4)4 · 2H2OTric. 1
7.CC.70LeightoniteK2Ca2Cu(SO4)4 · 2H2OTric.
7.CC.80KonyaiteNa2Mg(SO4)2 · 5H2OMon. 2/m : P21/b
7.CC.85WattevilleiteNa2Ca(SO4)2 · 4H2O (?)Orth.

Related Minerals - Dana Grouping (8th Ed.)Hide

29.5.3.1TamarugiteNaAl(SO4)2 · 6H2OMon. 2/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

25.11.1NatrojarositeNaFe3(SO4)2(OH)6Trig. 3m : R3m
25.11.2SideronatriteNa2Fe(SO4)2(OH) · 3H2OOrth. 2 2 2 : P21 21 21
25.11.3MetasideronatriteNa2Fe(SO4)2(OH) · H2OOrth. mmm (2/m 2/m 2/m)
25.11.4FerrinatriteNa3Fe(SO4)3 · 3H2OTrig. 3 : P3
25.11.6YavapaiiteKFe(SO4)2Mon. 2/m : B2/m
25.11.7KrausiteKFe(SO4)2 · H2OMon. 2/m : P21/m
25.11.8GoldichiteKFe(SO4)2 · 4H2OMon. 2/m : P21/b
25.11.9JarositeKFe3+3(SO4)2(OH)6Trig. 3m (3 2/m) : R3m
25.11.10VoltaiteK2Fe2+5Fe3+3Al(SO4)12 · 18H2OIso. m3m (4/m 3 2/m) : Fd3c
25.11.11UngemachiteK3Na8Fe(SO4)6(NO3)2 · 6H2OTrig. 3 : R3
25.11.12MetavoltineNa6K2FeFe6(SO4)12O2 · 18H2OTrig.
25.11.13Sabieite(NH4)Fe3+(SO4)2Trig. 3 2 : P3 2 1
25.11.14Ammoniojarosite(NH4)Fe3+3(SO4)2(OH)6Trig. 3m : R3m
25.11.15Clairite(NH4)2Fe3(SO4)4(OH)3 · 3H2OTric.
25.11.16Mohrite(NH4)2Fe(SO4)2 · 6H2OMon. 2/m : P21/b
25.11.17Lonecreekite(NH4)Fe3+(SO4)2 · 12H2OIso.
25.11.18Godovikovite(NH4)Al(SO4)2Trig. 3 2 : P3 2 1
25.11.19BotryogenMgFe3+(SO4)2(OH) · 7H2OMon. 2/m
25.11.21Slavíkite(H3O+)3Mg6Fe15(SO4)21(OH)18 · 98H2OTrig. 3 : R3
25.11.23SturmaniteCa6(Fe3+,Al,Mn3+)2(SO4)2[B(OH)4](OH)12 · 25H2OTrig. 3m : P3 1c
25.11.24Millosevichite(Al,Fe)2(SO4)3Trig. 3 : R3
25.11.25AluminocopiapiteAl2/3Fe3+4(SO4)6(OH)2 · 20H2OTric. 1 : P1
25.11.26HalotrichiteFeAl2(SO4)4 · 22H2OMon. 2 : P2
25.11.27Idrizite(Mg,Fe)(Al,Fe)2(SO4)3(OH)2 · 15H2O or near
25.11.28LishizheniteZnFe2(SO4)4 · 14H2OTric. 1 : P1
25.11.29ZincovoltaiteK2Zn5Fe3+3Al(SO4)12 · 18H2OIso. m3m (4/m 3 2/m) : Fd3c

Other InformationHide

IR Spectrum:
strong absorption bands in the 3000-3500 cm-1 range, with maxima at ca. 3110 and 3342 cm-1
Notes:
Soluble in water, astringent taste.
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 AmarilliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Ungemach, M.H. (1933) Sur quelques minéraux nouveaux. Comptes rendu de l’Académie des sciences de Paris: 197: 1132-1134.
Ungemach, M.H. (1935) Bulletin de la Société française de Minéralogie: 58: 200.
Foshag, W.F. (1934) New mineral names. American Mineralogist: 19: 287-288.
Foshag, W.F. (1936) New mineral names. American Mineralogist: 21: 269-272.
Palache, C., Berman, H., Frondel, C. (1951) The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 468.
Li J.-J., Zhou J.-L., Dong W. (1990) The structure of amarillite. Chinese Science Bulletin: 35: 2073–2075. [in English]
Jambor, J.L., Grew, E.S. (1992) New mineral names. American Mineralogist: 77: 207-213.
Yang, Z. & Giester, G. (2016): Hydrogen-bonding system in amarillite, NaFe(SO4)2(H2O)6: the structure refinement. European Journal of Mineralogy: 28: 953-958

Internet Links for AmarilliteHide

Localities for AmarilliteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - 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.
Canada
 
  • Nova Scotia
    • Cape Breton Co.
Zodrow, E.L. (1989) Summary report of secondary sulphate minerals, Sydney Coalfield, Nova Scotia, Canada. Nova Scotia Department of Mines & Energy, Report 89-3, Mines & Minerals Branch Report of Activities, Part A: 141-143.
Chile
 
  • Antofagasta
    • Antofagasta Province
      • Mejillones
        • Mejillones peninsula
XRD by Joachim Lorenz, SEM-EDS by Joy Desor
  • Atacama
    • Copiapó Province
C.R.Acad.Sci., Paris (1933) 197, p. 1133
  • Tarapacá
    • Tamarugal Province
      • Pampa del Tamarugal
Peter G. Seroka collection
China
 
  • Qinghai
    • Haixi Mongol and Tibetan Autonomous Prefecture
      • Da Qaidam (Dachaidan Co.)
        • Xitieshan
Guangzhi Tu, Xilin Li, Xande Xie, and Shusen Yin (1964): Acta Geologica Sinica 44(1), 99-101; American Mineralogist 90, 1518-1521; Yang, Z. & Giester, G. (2016): Hydrogen-bonding system in amarillite, NaFe(SO4)2(H2O)6: the structure refinement. European Journal of Mineralogy, 28, 953-958
Italy
 
  • Campania
    • Naples
      • Pozzuoli
- Russo, M., Campostrini, I., Demartin, F. (2017): I minerali di origine fumarolica dei Campi Flegrei: Solfatara di Pozzuoli (Napoli) e dintorni. Micro, 15, 122-192.; Mormone, A., Piochi, M., Balassone, G., Strauss, H., Troise, C., & De Natale, G. (2015, April). Mineralogical and sulfur isotopic characterization of the sulfur-bearing mineralization from the active degassing area of Campi Flegrei caldera (southern Italy). In EGU General Assembly Conference Abstracts (Vol. 17).
  • Sicily
    • Messina Province
      • Eolie Islands (Aeolian Islands)
        • Lipari
          • Vulcano Island
            • Porto Levante
              • Faraglioni di Levante (Grotte dei Faraglioni; Grotte del Faraglione; "Grotte de Faraglione")
Mikhail Murashko find and collection
 
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