Amarillite Mineral Data

Amarillite Mineral Data +

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General Amarillite Information

Chemical Formula:

NaFe+++(SO4)2·6(H2O)

Composition:

Molecular Weight = 379.06 gm

Sodium 6.07 % Na 8.18 % Na₂O

Iron 14.73 % Fe 21.06 % Fe₂O₃

Hydrogen 3.19 % H 28.52 % H₂O

Sulfur 16.92 % S 42.24 % SO₃

Oxygen 59.09 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

NaFe³⁺(SO₄)₂·6(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1933

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 69132

PDF 80-1306

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Amarillite Crystallography

Axial Ratios:

a:b:c =0.7765:1:1.1504

Cell Dimensions:

a = 8.419, b = 10.8409, c = 12.4717, Z = 4; beta = 95.495° V = 1,133.06 Den(Calc)= 2.22

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c

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Physical Properties of Amarillite

Cleavage:

[110] Good

Color:

Greenish yellow, Light yellow.

Density:

2.19

Diaphaniety:

Transparent

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Hardness:

2.5-3 - Finger Nail-Calcite

Luster:

Vitreous - Adamantine

Streak:

white

Optical Properties of Amarillite

Gladstone-Dale:

CI meas= -0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.007 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.252,KPDmeas= 0.2554,KC= 0.2536

Optical Data:

Biaxial (+), a=1.532, b=1.555, g=1.591, bire=0.0590

Calculated Properties of Amarillite

Electron Density:

r_electron=2.26 gm/cc
note: r_Amarillite=2.22 gm/cc.

Fermion Index

Fermion Index = 0.00468
Boson Index = 0.99532

Photoelectric:

PE_Amarillite= 5.42 barns/electron
U=PE_Amarillite x r_electron= 12.24 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Amarillite is Not Radioactive

Amarillite Classification

Dana Class:

29.5.3.2 (29)Hydrated Acid and Sulfates

(29.5)where A B (XO4)2 · x(H2O)

(29.5.3)Dana Group

29.5.3.1 Tamarugite NaAl(SO4)2·6(H2O) P 2₁/a 2/m

29.5.3.2 Amarillite NaFe(SO4)2·6(H2O) C 2/c 2/m

Strunz Class:

VI/C.15-30 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/C - Water-bearing sulfates without unfamiliar anions. cations of medium and very big size

VI/C.15 - Krausite - Amarillite series

VI/C.15-10 Krausite KFe(SO4)2·(H2O) P 2₁/m 2/m

VI/C.15-20 Tamarugite NaAl(SO4)2·6(H2O) P 2₁/a 2/m

VI/C.15-30 Amarillite NaFe(SO4)2·6(H2O) C 2/c 2/m

Other Amarillite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Amarillite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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Print or Cut-and-Paste your Amarillite Specimen Label here :

Amarillite

NaFe+++(SO4)2·6(H2O)
Dana No: 29.5.3.2 Strunz No: VI/C.15-30
Locality:

Notes: