Szomolnokite Mineral Data

General Szomolnokite Information

Chemical Formula:

Fe++SO4•(H2O)

Composition:

Molecular Weight = 169.93 gm

Iron 32.87 % Fe 42.28 % FeO

Hydrogen 1.19 % H 10.60 % H₂O

Sulfur 18.87 % S 47.12 % SO₃

Oxygen 47.08 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺(SO₄)•(H₂O)

Environment:

Secondary mineral formed in pyrite-rich oxidized sulfide deposits, typically under highly acid and arid conditions.

IMA Status:

Valid Species (Pre-IMA) 1877

Locality:

Smolnik (Szomolnok), 16 km northeast of Roznava, Slovakia. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Szomolnokite + Pronunciation

Synonym:

ICSD 71345

PDF 45-1365

Szomolnokite Image

Images:

Click Here for Larger Szomolnokite Image

Szomolnokite Voltaite

Comments: Whitish crystalline crust of voltaite on crystals of brown szomolnokite.
Location: Alcaparrosa Mine, Cerritos Bayos, Chile. Scale: Picture size 1 cm.
© John Veevaert

Images:

Szomolnokite Halotrichite

Comments: Tan powdery szomolnokite crust on silky fibrous halotrichite with yellow metavoltine.
Location: Markey Mine, Red Canyon, San Juan County, Utah, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Szomolnokite Crystallography

Axial Ratios:

a:b:c =1.0208:1:0.9538

Cell Dimensions:

a = 7.624, b = 7.468, c = 7.123, Z = 4; beta = 115.867° V = 364.92 Den(Calc)= 3.09

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: A2/a

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

By Intensity(I/I_o): 3.44(1), 3.12(0.4), 2.52(0.35),

Crystal Structure:

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H - Help Screen
I - Data Info
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Wildner M , Giester G , Neues Jahrbuch fur Mineralogie, Monatshefte , 1991 (1991) p.296-306, The crystal structures of kieserite-type compounds., I. Crystal structures of Me(II)SO4*H2O (Me = Mn,Fe,Co,Ni,Zn), Locality: synthetic

Physical Properties of Szomolnokite

Cleavage:

{???} Indistinct

Color:

Bluish, Colorless, Yellow, Yellow brown, Light blue.

Density:

3.03 - 3.07, Average = 3.05

Diaphaneity:

Transparent to Translucent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Hardness:

2.5 - Finger Nail

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Szomolnokite

Gladstone-Dale:

CI meas= -0.031 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.018 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2025,KPDmeas= 0.2051,KC= 0.1989
Ncalc = 1.6 - 1.61

Optical Data:

Biaxial (+), a=1.591, b=1.623, g=1.663, bire=0.0720, 2V(Calc)=86, 2V(Meas)=80.

Calculated Properties of Szomolnokite

Electron Density:

Bulk Density (Electron Density)=3.05 gm/cc
note: Specific Gravity of Szomolnokite =3.09 gm/cc.

Fermion Index:

Fermion Index = 0.0086105327
Boson Index = 0.9913894673

Photoelectric:

PE_Szomolnokite= 10.85 barns/electron
U=PE_Szomolnokite x rElectron Density= 33.14 barns/cc.

Radioactivity:

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

Szomolnokite Classification

Dana Class:

29.06.02.02 (29)Hydrated Acid and Sulfates

(29.06)where A XO4 · x(H2O)

(29.06.02)Kieserite Group (Mono-hydrates)

29.06.02.01 Kieserite MgSO4•(H2O) C 2/c 2/m

29.06.02.02 Szomolnokite FeSO4•(H2O) A2/a 2/m

29.06.02.03 Szmikite MnSO4•(H2O) A2/a 2/m

29.06.02.04 Poitevinite (Cu,Fe,Zn)SO4•(H2O) P1 1

29.06.02.05 Gunningite (Zn,Mn)SO4•(H2O) A2/a 2/m

29.06.02.06 Dwornikite (Ni,Fe)SO4•(H2O) C 2/c 2/m

29.06.02.07 Cobaltkieserite! CoSO4•H2O C 2/c 2/m

Strunz Class:

07.CB.05 07 - SULFATES (SELENATES, TELLURATES)

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

07.CB -With only medium-sized cations

07.CB.05 Gunningite (Zn,Mn)SO4•(H2O) A2/a 2/m

07.CB.05 Dwornikite (Ni,Fe)SO4•(H2O) C 2/c 2/m

07.CB.05 Kieserite MgSO4•(H2O) C 2/c 2/m

07.CB.05 Poitevinite (Cu,Fe,Zn)SO4•(H2O) P1 1

07.CB.05 Szomolnokite FeSO4•(H2O) A2/a 2/m

07.CB.05 Szmikite MnSO4•(H2O) A2/a 2/m

07.CB.05 Cobaltkieserite! CoSO4•H2O C 2/c 2/m

Other Szomolnokite 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 Szomolnokite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Athena
5 - EUROmin Project
6 - Ecole des Mines de Paris
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - WWW-MINCRYST

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

Szomolnokite

Fe++SO4•(H2O)
Dana No: 29.06.02.02 Strunz No: 07.CB.05
Locality:

Notes: