Bilinite Mineral Data

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General Bilinite Information

Chemical Formula:

Fe++Fe+++2(SO4)4•22(H2O)

Composition:

Molecular Weight = 948.13 gm

Iron 17.67 % Fe 7.58 % FeO / 16.84 % Fe₂O₃

Hydrogen 4.68 % H 41.80 % H₂O

Sulfur 13.53 % S 33.78 % SO₃

Oxygen 64.12 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺Fe³⁺₂(SO₄)₄•22(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1913

Locality:

Schwaz, near Bilin, Bohemia, Czech Republic. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Bilinite

Bilinite Image

Images:

Bilinite

Comments: Powdery crust of white bilinite on pyrite.
Location: Bisbee, Cochise County, Arizona, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Bilinite Crystallography

Axial Ratios:

a:b:c =0.2551:1:0.8735

Cell Dimensions:

a = 6.208, b = 24.333, c = 21.255, Z = 4; beta = 100.3° V = 3,159.02 Den(Calc)= 1.99

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/c

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

By Intensity(I/I_o): 3.51(1), 4.21(1), 4.85(0.5),4.1(0.4), 2.89(0.3), 3.29(0.3), 4.96(0.3), 5.48(0.3),

Physical Properties of Bilinite

Color:

White, Yellow.

Density:

1.87

Diaphaneity:

Transparent

Habit:

Fibrous - Crystals made up of fibers.

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Hardness:

2 - Gypsum

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Bilinite

Gladstone-Dale:

CI meas= 0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.067 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2513,KPDmeas= 0.2674,KC= 0.2692
Ncalc = 1.5 - 1.54

Optical Data:

Biaxial (+/-), b=1.5

Calculated Properties of Bilinite

Electron Density:

Bulk Density (Electron Density)=1.93 gm/cc
note: Specific Gravity of Bilinite =1.87 gm/cc.

Fermion Index:

Fermion Index = 0.0050755938
Boson Index = 0.9949244062

Photoelectric:

PE_Bilinite= 5.92 barns/electron
U=PE_Bilinite x rElectron Density= 11.45 barns/cc.

Radioactivity:

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

Bilinite Classification

Dana Class:

29.07.03.05 (29)Hydrated Acid and Sulfates

(29.07)where A (B)2 (XO4)4 · x(H2O)

(29.07.03)Halotrichite Group (Monoclinic with 22 H2O)

29.07.03.01 Pickeringite MgAl2(SO4)4•22(H2O) P 2 2

29.07.03.02 Halotrichite FeAl2(SO4)4•22(H2O) P 2 2

29.07.03.03 Apjohnite MnAl2(SO4)4•22(H2O) P 2₁/c 2/m

29.07.03.04 Dietrichite (Zn,Fe,Mn)Al2(SO4)4•22(H2O) P 2₁/c 2/m

29.07.03.05 Bilinite FeFe2(SO4)4•22(H2O) P 2₁/c 2/m

29.07.03.06 Redingtonite (Fe,Mg,Ni)(Cr,Al)2(SO4)4•22(H2O) Mono

29.07.03.07 Wupatkiite (Co,Mg,Ni)Al2(SO4)4•22(H2O) P 2₁/c 2/m

Strunz Class:

07.CB.85 07 - SULFATES (SELENATES, TELLURATES)

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

07.CB -With only medium-sized cations

07.CB.85 Bilinite FeFe2(SO4)4•22(H2O) P 2₁/c 2/m

07.CB.85 Apjohnite MnAl2(SO4)4•22(H2O) P 2₁/c 2/m

07.CB.85 Dietrichite (Zn,Fe,Mn)Al2(SO4)4•22(H2O) P 2₁/c 2/m

07.CB.85 Halotrichite FeAl2(SO4)4•22(H2O) P 2 2

07.CB.85 Pickeringite MgAl2(SO4)4•22(H2O) P 2 2

07.CB.85 Redingtonite (Fe,Mg,Ni)(Cr,Al)2(SO4)4•22(H2O) Mono

07.CB.85 Wupatkiite (Co,Mg,Ni)Al2(SO4)4•22(H2O) P 2₁/c 2/m

Other Bilinite Information

References:

NAME( Dana8) PHYS. PROP.(Ford32) OPTIC PROP.(Ford32)

See Also:

Links to other databases for Bilinite :
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

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Ask about Bilinite 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 Bilinite Specimen Label here :

Bilinite

Fe++Fe+++2(SO4)4•22(H2O)
Dana No: 29.07.03.05 Strunz No: 07.CB.85
Locality:

Notes: