Amarantite Mineral Data

Amarantite Mineral Data +

[Newest Minerals] [Minerals for Sale] [Tsumeb Mine] [Mineral Auctions] [Mineral Gallery]
The Mineral Gallery's Exceptional Specimens and Mineral Hall of Fame
Visa and Mastercard are Welcome

General Amarantite Information

Chemical Formula:

Fe+++(SO4)(OH)·3(H2O)

Composition:

Molecular Weight = 222.96 gm

Iron 25.05 % Fe 35.81 % Fe₂O₃

Hydrogen 3.16 % H 28.28 % H₂O

Sulfur 14.38 % S 35.91 % SO₃

Oxygen 57.41 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe³⁺(SO₄)(OH)·3(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1888

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 9649

PDF 17-158

Amarantite Image

Images:

Amarantite

Comments: Amber-like, long, prismatic, bright red amarantite crystals.
Location: Chuquicamata, Antofagasta, Chile. Scale: Crystal size 3 cm.
© Tom Loomis / Dakota Matrix

Amarantite Crystallography

Axial Ratios:

a:b:c =0.7698:1:0.5743

Cell Dimensions:

a = 8.9, b = 11.56, c = 6.64, Z = 4; alpha = 95.635°, beta = 90.985°, gamma = 97.625° V = 673.74 Den(Calc)= 2.20

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 8.69(1), 11.3(1), 3.57(0.8),

Forms:

Mouse
Dbl Clk - Start-Stop Rotation
RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
Keyboard
S - Stereo
I - Indicies
<space> - Start-Stop Rotation
F - Fit to Screen
M - Menu
Help on Above

Forms: [ 0 1 0] [ 1 2 1] [ 0 1 1] [ 1 0 0] [ 0 0 1]

Warning: this large pop-up is very compute intensive and may not work well with some computers.

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Susse P , Zeitschrift fur Kristallographie , 127 (1968) p.261-275, The crystal structure of amarantite, Fe2(SO4)2O*7H2O, Locality: Quetena, Chile

Physical Properties of Amarantite

Cleavage:

[010] Perfect, [100] Perfect

Color:

Brown red, Orange red, Pink, Red.

Density:

2.189 - 2.286, Average = 2.23

Diaphaniety:

Transparent

Hardness:

2.5 - Finger Nail

Luster:

Vitreous (Glassy)

Streak:

yellow

Optical Properties of Amarantite

Gladstone-Dale:

CI meas= 0.052 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.035 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2629,KPDmeas= 0.2585,KC= 0.2725

Optical Data:

Biaxial (-), a=1.516, b=1.598, g=1.621, bire=0.1050, 2V(Calc)=52, 2V(Meas)=30.

Calculated Properties of Amarantite

Electron Density:

r_electron=2.23 gm/cc
note: r_Amarantite=2.20 gm/cc.

Fermion Index

Fermion Index = 0.00666
Boson Index = 0.99334

Photoelectric:

PE_Amarantite= 8.16 barns/electron
U=PE_Amarantite x r_electron= 18.19 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Amarantite is Not Radioactive

Amarantite Classification

Dana Class:

31.9.3.1 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.9)where (A+ B++) (XO4) Zq·x(H2O)

(31.9.3)Dana Group

31.9.3.1 Amarantite Fe(SO4)(OH)·3(H2O) P1 1

Strunz Class:

VI/D.01-40 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/D - Water-bearing sulfates with unfamiliar anions. cations of medium size

VI/D.01 - Metahohmannite - Xitieshanite series

VI/D.01-10 Metahohmannite Fe2[O(SO4)2]·4(H2O) P1 1

VI/D.01-20 Butlerite Fe(SO4)(OH)·2(H2O) P 2₁/m 2/m

VI/D.01-30 Parabutlerite Fe(SO4)(OH)·2(H2O) Pmnb 2/m 2/m 2/m

VI/D.01-40 Amarantite Fe(SO4)(OH)·3(H2O) P1 1

VI/D.01-50 Hohmannite Fe2(SO4)2(OH)2·7(H2O) P1 1

VI/D.01-60 Fibroferrite Fe(SO4)(OH)·5(H2O) R 3 3

VI/D.01-70 Xitieshanite Fe(SO4)(OH)·7(H2O) P 2₁/a 2/m

Other Amarantite Information

References:

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

Search for Amarantite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Amarantite :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Amarantite Mineral Data :

Ask about Amarantite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Amarantite

Fe+++(SO4)(OH)·3(H2O)
Dana No: 31.9.3.1 Strunz No: VI/D.01-40
Locality:

Notes: