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Amarillite

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Amarillit
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Amarillit (SNr: A000495)

Weiße faserige Kristalle schichtweise mit gelbgrünen Botryogen, überwachsen von weißen Ausblühungen, BB = 6 mm; Fundort: Cerros Los Pintados, Provinz Iquique, I. Region (Tarapacá), Chile.

Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2015-11-27
Locality: Cerros Los Pintados / Iquique, Provinz / Tarapacá, Region (I. Region) / Chile

Collectors Summary

Color grünlich-gelb, gelb
Streak color weiß
Lustre Glasglanz, Diamantglanz
Hardness (Mohs) 2.5 - 3
Solubility +++ H2O
Crystal System monoklin, C2/c

Chemism

Chem­ical formula

NaFe3+(SO4)2·6H2O

Chem­ical com­po­si­tion

Eisen, Natrium, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 379.0533542 u; Number of atoms in the formula: 30

Info

Empirical formula:

NaFe(SO4)2·6H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

3.19

12

40.00

1.0079470

12.0953640

Oxygen

O

59.09

14

46.67

15.9994300

223.9920200

Sodium

Na

6.07

1

3.33

22.9897702

22.9897702

Sulfur

S

16.92

2

6.67

32.0655000

64.1310000

Iron

Fe

14.73

1

3.33

55.8452000

55.8452000

Anal­y­sis wt%

Na2O : 7.14, Fe2O3 : 21.39, SO3 : 43.59, H2O : 28.45 (Ref: Bulletin de Mineralogie 35)

Strunz 9th edi­tion incl. updates

7.CC.10

7: Sulfate (Selenate, Tellurate, Chromate, Molybdate, Wolframate)
C: Sulfate (Selenate, etc.) ohne weitere Anionen, mit H2O
C: Mit mittelgroßen und großen [Kationen]
10:Tamarugit-Gruppe

Lapis Clas­sifica­tion

VI/C.15-030

VI: SULFATE, CHROMATE, MOLYBDATE UND WOLFRAMATE
C: Wasserhaltige Sulfate, ohne fremde Anionen
15: Mittelgroße und sehr große Kationen

Clas­sifica­tion by Hölzel

7.CD.370

7: SULFATES CHROMATES MOLYBDATES WOLFRAMATES
C: Sulfates (-Anions +Water)
D: Sulfates, C medium + large
3: Picromerite-Group

Dana 8th edi­tion

29.05.03.02

29: Hydrated Acid and Sulfates
05: Hydrated Acid and Sulfates where A B (XO4)2 · x(H2O)

IMA sta­tus

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

grünlich-gelb, gelb

Streak color

weiß

Lus­tre

Glasglanz, Diamantglanz

max. Birefrin­gence

0.059

Birefringence chart\! Amarillite title=Birefringence chart Amarillite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.532

RI value β

1.555

RI value γ / ε

1.591

Ri mean

1.559

2V angle

Biaxial (+) 80°

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

15

Space Group

C2/c

Cell param­e­ters a (Å)

8.419

Cell param­e­ters b (Å)

10.841

Cell param­e­ters c (Å)

12.472

Cell param­e­ters a/b or c/a

0.777

Cell param­e­ters c/b

1.150

Cell param­e­ters α

90°

Cell param­e­ters β

95.50

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

1133.084

Kristall struc­ture

Zhuming Yang, Gerald Giester: Hydrogen-bonding system in amarillite, NaFe(SO4)2(H2O)6: the structure refinement. Eur J Mineral Vol. 28 No. 5 (2016) S. 953-958.

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

2.5 - 3

VHN (Hard­ness Vick­ers)

68 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

2.19

2.222 ( ρ calc. Mineralienatlas )

Radioac­tiv­ity

keine

Insta­bil­ity

+++ H2O

Preface

Author (Name, Year)

Ungemach, 1933

References

Handbook of Mineralogy (Anthony et al.), 5 (2003), 16

ZHUMING YANG; GERALD GIESTER - Hydrogen-bonding system in amarillite, NaFe(SO4)2(H2O)6: the structure refinement - E. Schweizerbart'sche Verlagsbuchhandlung [Appeared or available online: 14. Juni 2016]

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Amarillite

NaFe3+(SO4)2·6H2O

monoklin : 2/m : C2/c

7.CC.10

Tamarugite

NaAl(SO4)2·6H2O

monoklin : 2/m : P21/a

7.CC.10

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Krausite

KFe3+(SO4)2·H2O

monoklin : 2/m : P21/m

VI/C.15-010

Tamarugite

NaAl(SO4)2·6H2O

monoklin : 2/m : P21/a

VI/C.15-020

Amarillite

NaFe3+(SO4)2·6H2O

monoklin : 2/m : C2/c

VI/C.15-030

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Picromerite

K2Mg(SO4)2·6H2O

monoklin : 2/m : P21/a

7.CD.300

Boussingaultite

(NH4)2Mg(SO4)2·6H2O

monoklin : 2/m : P21/a

7.CD.310

Cyanochroite

K2Cu(SO4)·6H2O

monoklin : 2/m : P21/c

7.CD.320

Mohrite

(NH4)2Fe2+(SO4)2·6H2O

monoklin : 2/m : P21/a

7.CD.330

'Nickelboussingaultite'

(NH4)2(Ni,Mg)(SO4)2·6H2O

7.CD.340

Amarillite

NaFe3+(SO4)2·6H2O

monoklin : 2/m : C2/c

7.CD.370

Tamarugite

NaAl(SO4)2·6H2O

monoklin : 2/m : P21/a

7.CD.375

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Krausite

KFe3+(SO4)2·H2O

monoklin : 2/m : P21/m

29.05.01.01

Goldichite

KFe3+(SO4)2·4H2O

monoklin : 2/m : P21/c

29.05.02.01

Tamarugite

NaAl(SO4)2·6H2O

monoklin : 2/m : P21/a

29.05.03.01

Amarillite

NaFe3+(SO4)2·6H2O

monoklin : 2/m : C2/c

29.05.03.02

Mendozite

NaAl(SO4)2·11H2O

monoklin : 2/m : C2/c

29.05.04.01

Alum-(K)

KAl(SO4)2·12H2O

kubisch : m3 : Pa3

29.05.05.01

Alum-(Na)

NaAl(SO4)2·12H2O

kubisch : m3 : Pa3

29.05.05.02

Tschermigite

(NH4)Al(SO4)2·12H2O

kubisch : m3 : Pa3

29.05.05.03

Lonecreekite

(NH4)(Fe3+,Al)(SO4)2·12H2O

kubisch : m3 : Pa3

29.05.05.04

Lanmuchangite

TlAl[SO4]2·12H2O

kubisch : m3 : Pa3

29.05.05.05

Other languages

German

Amarillit

Spanish

Amarillita

French

Amarillite

English

Amarillite

Russian

Амариллит

Simplified Chinese

黄铁钠矾

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Amarillit
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English pages

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Russian pages

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