Hisingerite Mineral Data

Hisingerite Mineral Data +

General Hisingerite Information

Chemical Formula:

Fe+++2Si2O5(OH)4·2(H2O)

Composition:

Molecular Weight = 351.92 gm

Iron 31.74 % Fe 45.38 % Fe₂O₃

Silicon 15.96 % Si 34.15 % SiO₂

Hydrogen 2.29 % H 20.48 % H₂O

Oxygen 50.01 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe³⁺₂Si₂O₅(OH)₄·2(H₂O)

Environment:

Secondary mineral formed from weathering or late-stage deuteric alteration of iron-bearing silicates or sulfides.

IMA Status:

Valid Species (Pre-IMA) 1828

Locality:

Riddarhyttan, Vastmanland, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named for Wilhelm Hisinger (1766-1852), eminent Swedish chemist.

Synonym:

Canbyite

Scotiolite

Sturtite

Hisingerite Image

Images:

Hisingerite

Comments: Resinous reddish brown coatings of hisingerite on rock.
Location: Agnew Nickel Deposit, near Leinster, Western Australia, Australia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Hisingerite Crystallography

Axial Ratios:

a:b:c =0.598:1:1.66

Cell Dimensions:

a = 5.4, b = 9.03, c = 14.99, Z = 4; beta = 98.32° V = 723.25 Den(Calc)= 3.23

Crystal System:

MonoclinicSpace Group: Unk

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

By Intensity(I/I_o): 1.72(1), 2.456(1), 4.23(1),

Physical Properties of Hisingerite

Cleavage:

None

Color:

Brownish black, Black.

Density:

2.43 - 2.67, Average = 2.54

Diaphaniety:

Subtransparent to opaque

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Compact - Occurs as a compact mass.

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Hardness:

3 - Calcite

Luminescence:

Non-fluorescent.

Luster:

Greasy (Oily)

Streak:

yellowish brown

Optical Properties of Hisingerite

Gladstone-Dale:

CI meas= 0.001 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.211 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2237,KPDmeas= 0.2833,KC= 0.2836

Optical Data:

Biaxial (-), a=1.715, g=1.73, bire=0.0150

Calculated Properties of Hisingerite

Electron Density:

r_electron=2.55 gm/cc
note: r_Hisingerite=2.55 gm/cc.

Fermion Index

Fermion Index = 0.01442
Boson Index = 0.98558

Photoelectric:

PE_Hisingerite= 9.92 barns/electron
U=PE_Hisingerite x r_electron= 25.31 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Hisingerite is Not Radioactive

Hisingerite Classification

Dana Class:

71.1.4.2 (71)Phyllosilicate Sheets of Six-Membered Rings

(71.1)with 1:1 layers

(71.1.4)Allophane group

71.1.4.1 Allophane Al2O3·(SiO2)1.3-2·((H2O))2.5-3 None

71.1.4.2 Hisingerite Fe2Si2O5(OH)4·2(H2O) Unk Mono

71.1.4.3 Imogolite Al2SiO3(OH)4 ? Mono

71.1.4.4 Neotocite (Mn,Fe)SiO3·(H2O)(?) None

71.1.4.5 Zinalsite! Zn2AlSi2O5(OH)4·2(H2O)(?) Mono

Strunz Class:

VIII/H.26-50 VIII - Silicates

VIII/H - Phyllosilicates (layered) Mica like with [Si4O10]4- and related groups

VIII/H.26 - Allophane - Sturtite series

VIII/H.26-10 Allophane Al2O3·(SiO2)1.3-2·((H2O))2.5-3 None

VIII/H.26-30 Imogolite Al2SiO3(OH)4 ? Mono

VIII/H.26-40 Odinite (Fe,Mg,Al,Fe,Ti,Mn)2.5(Si,Al)2O5(OH)4 Cm m

VIII/H.26-50 Hisingerite Fe2Si2O5(OH)4·2(H2O) Unk Mono

VIII/H.26-60 Neotocite (Mn,Fe)SiO3·(H2O)(?) None

VIII/H.26-70 Sturtite* (Fe3)(Mn2,Ca,Mg)Si4O10(OH)3·10(H2O) None

Other Hisingerite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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Hisingerite

Fe+++2Si2O5(OH)4·2(H2O)
Dana No: 71.1.4.2 Strunz No: VIII/H.26-50
Locality:

Notes: