Ammoniojarosite Mineral Data

General Ammoniojarosite Information

Chemical Formula:

(NH4)Fe+++3(SO4)2(OH)6

Composition:

Molecular Weight = 479.75 gm

Iron 34.92 % Fe 49.93 % Fe₂O₃

Hydrogen 0.84 % H - % Calc as (NH₄)₂O

Hydrogen 1.26 % H 11.27 % H₂O

Sulfur 13.37 % S 33.38 % SO₃

Nitrogen 2.92 % N 5.43 % (NH₄)₂O

Oxygen 46.69 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

(NH₄)Fe³⁺₃(SO₄)₂(OH)₆

Environment:

Formed in black lignitic shales containing pyrite.

IMA Status:

Valid Species (Pre-IMA) 1927

Locality:

Undefined locality on the "west side of the Kaibab fault, Kane Co., Utah". Link to MinDat.org Location Data.

Name Origin:

Named as the ammonium analog of jarosite.

Name Pronunciation:

Ammoniojarosite + Pronunciation

Ammoniojarosite Image

Images:

Ammoniojarosite

Comments: Tan colored fine-grained massive ammoniojarosite, intimately associated with quartz.
Location: Wamsutter, Sweetwater County, Wyoming, USA. Scale: See Image.
© Rruff Database

Ammoniojarosite Crystallography

Axial Ratios:

a:c = 1:2.36111

Cell Dimensions:

a = 7.2, c = 17, Z = 3; V = 763.21 Den(Calc)= 3.13

Crystal System:

Trigonal - Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.1(1), 5.1(0.6), 1.99(0.4),

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Forms: ( 1 1 1) ( 1 1 2) ( 0 0 1)

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Physical Properties of Ammoniojarosite

Color:

Yellow.

Density:

3.02

Diaphaneity:

Transparent

Hardness:

3.5-4.5 - Between Copper Penny and Fluorite-Apatite

Luminescence:

Non-fluorescent.

Luster:

Earthy (Dull)

Streak:

light yellow

Optical Properties of Ammoniojarosite

Gladstone-Dale:

CI meas= -0.008 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.028 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2476,KPDmeas= 0.2566,KC= 0.2547
Ncalc = 1.77 - 1.8

Optical Data:

Uniaxial (-), e=1.75, w=1.8, bire=0.0500.

Calculated Properties of Ammoniojarosite

Electron Density:

Bulk Density (Electron Density)=3.01 gm/cc
note: Specific Gravity of Ammoniojarosite =3.02 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_{Ammoniojarosite}= 11.07 barns/electron
U=PE_{Ammoniojarosite} x rElectron Density= 33.31 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ammoniojarosite is Not Radioactive

Ammoniojarosite Classification

Dana Class:

30.02.05.04 (30)Anhydrous Sulfates Containing Hydroxyl or Halogen

(30.02)where (A B)2 XO4 Zq

(30.02.05)Alunite Group (Jarosite Subgroup)

30.02.05.01 Jarosite KFe3(SO4)2(OH)6 R 3 3

30.02.05.02 Natrojarosite NaFe3(SO4)2(OH)6 R 3m 3m

30.02.05.03 Hydroniumjarosite (H3O)Fe3(SO4)2(OH)6 R 3m 3m

30.02.05.04 Ammoniojarosite (NH4)Fe3(SO4)2(OH)6 R 3m 3m

30.02.05.05 Argentojarosite AgFe3(SO4)2(OH)6 R 3m 3m

30.02.05.06 Plumbojarosite PbFe6(SO4)4(OH)12 R 3m 3 2/m

30.02.05.07 Beaverite PbCu(Fe,Al)2(SO4)2(OH)6 R 3m 3m

30.02.05.08 Dorallcharite (Tl,K)Fe3(SO4)2(OH)6 R 3m 3 2/m

Strunz Class:

07.BC.10 07 - SULFATES (SELENATES, TELLURATES)

07.B - Sulfates (selenates, etc.) with Additional Anions, without H2O

07.BC -With medium-sized and large cations

07.BC.10 Alunite KAl3(SO4)2(OH)6 R 3m, R 3m Trig

07.BC.10 Ammonioalunite (NH4)Al3(SO4)2(OH)6 R 3m 3 2/m

07.BC.10 Ammoniojarosite (NH4)Fe3(SO4)2(OH)6 R 3m 3m

07.BC.10 Beaverite PbCu(Fe,Al)2(SO4)2(OH)6 R 3m 3m

07.BC.10 Argentojarosite AgFe3(SO4)2(OH)6 R 3m 3m

07.BC.10 Huangite Ca0.5Al3(SO4)2(OH)6 R 3m 3 2/m

07.BC.10 Dorallcharite (Tl,K)Fe3(SO4)2(OH)6 R 3m 3 2/m

07.BC.10 Jarosite KFe3(SO4)2(OH)6 R 3 3

07.BC.10 Hydroniumjarosite (H3O)Fe3(SO4)2(OH)6 R 3m 3m

07.BC.10 Minamiite (Na,Ca,K)Al3(SO4)2(OH)6 R 3m 3 2/m

07.BC.10 Natrojarosite NaFe3(SO4)2(OH)6 R 3m 3m

07.BC.10 Natroalunite NaAl3(SO4)2(OH)6 R 3m 3 2/m

07.BC.10 Osarizawaite PbCuAl2(SO4)2(OH)6 R 3m 3m

07.BC.10 Plumbojarosite PbFe6(SO4)4(OH)12 R 3m 3 2/m

07.BC.10 Schlossmacherite (H3O,Ca)Al3(AsO4,SO4)2(OH)6 R 3m 3 2/m

07.BC.10 Walthierite Ba0.5Al3(SO4)2(OH)6 R 3m 3 2/m

Other Ammoniojarosite Information

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Ammoniojarosite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Ammoniojarosite

(NH4)Fe+++3(SO4)2(OH)6
Dana No: 30.02.05.04 Strunz No: 07.BC.10
Locality:

Notes:

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