Siderotil Mineral Data

Siderotil Mineral Data +

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General Siderotil Information

Chemical Formula:

Fe++SO4·5(H2O)

Composition:

Molecular Weight = 241.99 gm

Iron 23.08 % Fe 29.69 % FeO

Hydrogen 4.17 % H 37.22 % H₂O

Sulfur 13.25 % S 33.09 % SO₃

Oxygen 59.51 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺(SO₄)·5(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1891

Locality:

Link to MinDat.org Location Data.

Siderotil Image

Images:

Siderotil

Comments: Siderotil pseudomorphs after melanterite.
Location: 2700' level, Campbell Shaft, Bisbee, Cochise County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Siderotil Crystallography

Axial Ratios:

a:b:c =0.5888:1:0.57

Cell Dimensions:

a = 6.26, b = 10.63, c = 6.06, Z = 2; alpha = 97.25°, beta = 109.67°, gamma = 75° V = 363.85 Den(Calc)= 2.21

Crystal System:

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

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

By Intensity(I/I_o): 4.89(1), 3.73(0.8), 5.57(0.6),

Crystal Structure:

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Peterson R C , Roeder P L , Zhang Y , The Canadian Mineralogist , 41 (2003) p.671-676, The atomic structure of siderotil, (Fe,Cu)SO4.5H2O

Physical Properties of Siderotil

Color:

Yellowish, Yellowish white, White, Light green, Light green white.

Density:

2.1 - 2.2, Average = 2.15

Diaphaniety:

Transparent to Translucent

Hardness:

2.5 - Finger Nail

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Siderotil

Gladstone-Dale:

CI meas= -0.013 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.014 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2375,KPDmeas= 0.2441,KC= 0.2409

Optical Data:

Biaxial (-), a=1.513-1.515, b=1.525-1.526, g=1.534-1.536, bire=0.0210, 2V(Calc)=80-86, 2V(Meas)=50.

Calculated Properties of Siderotil

Electron Density:

r_electron=2.20 gm/cc
note: r_Siderotil=2.15 gm/cc.

Fermion Index

Fermion Index = 0.00617
Boson Index = 0.99383

Photoelectric:

PE_Siderotil= 7.46 barns/electron
U=PE_Siderotil x r_electron= 16.45 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Siderotil is Not Radioactive

Siderotil Classification

Dana Class:

29.6.7.2 (29)Hydrated Acid and Sulfates

(29.6)where A XO4 · x(H2O)

(29.6.7)Chalchanthite Group (Triclinic: P1¯)

29.6.7.1 Chalcanthite CuSO4·5(H2O) P1 1

29.6.7.2 Siderotil FeSO4·5(H2O) P1 1

29.6.7.3 Pentahydrite MgSO4·5(H2O) P1 1

29.6.7.4 Jokokuite MnSO4·5(H2O) P1 1

Strunz Class:

VI/C.04-20 VI - Sulfates,Chromates,Molybdates and Tungstates

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

VI/C.04 - Chalcanthite group

VI/C.04-10 Pentahydrite MgSO4·5(H2O) P1 1

VI/C.04-20 Siderotil FeSO4·5(H2O) P1 1

VI/C.04-30 Jokokuite MnSO4·5(H2O) P1 1

VI/C.04-40 Chalcanthite CuSO4·5(H2O) P1 1

Other Siderotil 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 Siderotil :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Google Images
4 - Google Scholar
5 - Handbook of Mineralogy (MinSocAm)
6 - Handbook of Mineralogy (UofA)
7 - MinDAT
8 - MinMax(Deutsch)
9 - MinMax(English)
10 - Mineral and Gemstone Kingdom
11 - Mineralienatlas (Deutsch)
12 - QUT Mineral Atlas
13 - Ruff.Info
14 - WWW-MINCRYST

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Siderotil

Fe++SO4·5(H2O)
Dana No: 29.6.7.2 Strunz No: VI/C.04-20
Locality:

Notes: