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Hisingerite

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Wilhelm Hisinger
Formula:
Fe23+(Si2O5)(OH)4 · 2H2O
System:
Monoclinic
Colour:
Black, Brownish-black
Lustre:
Vitreous, Resinous, Greasy
Hardness:
2½ - 3
Name:
For the Swedish chemist and mineralogist, Wilhelm Hisinger (1765-1852)
Amorphous to poorly crystalline hydrated iron silicate.

Compare neotocite and siderogel.

Classification of Hisingerite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
9.ED.10

9 : SILICATES (Germanates)
E : Phyllosilicates
D : Phyllosilicates with kaolinite layers composed of tetrahedral and octahedral nets
71.1.5.2

71 : PHYLLOSILICATES Sheets of Six-Membered Rings
1 : Sheets of 6-membered rings with 1:1 layers
14.19.8

14 : Silicates not Containing Aluminum
19 : Silicates of Fe
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Type Occurrence of Hisingerite

Year of Discovery:
1828

Occurrences of Hisingerite

Geological Setting:
Secondary mineral formed by weathering or deuteric alteration of iron bearing silicates or sulfides.

Physical Properties of Hisingerite

Vitreous, Resinous, Greasy
Diaphaneity (Transparency):
Transparent, Translucent
Colour:
Black, Brownish-black
Streak:
Yellowish brown, green
Hardness (Mohs):
2½ - 3
Tenacity:
Brittle
Fracture:
Conchoidal
Density:
2.43 - 2.67 g/cm3 (Measured)    

Crystallography of Hisingerite

Crystal System:
Monoclinic
Cell Parameters:
a = 5.4Å, b = 9.03Å, c = 14.99Å
β = 98.32°
Ratio:
a:b:c = 0.598 : 1 : 1.66
Unit Cell Volume:
V 723.25 ų (Calculated from Unit Cell)
Morphology:
Massive, compact, minutely spherical.
Comment:
Amorphous to poorly crystalline
X-Ray Powder Diffraction Data:
d-spacingIntensity
4.45 (s)
3.53 (s)
2.56 (s)
1.71 (s)
1.54 (s)
Comments:
Very similar to data of neotocite.

Optical Data of Hisingerite

Type:
Biaxial (-)
RI values:
nα = 1.715 nγ = 1.730
Max Birefringence:
δ = 0.015
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r < v
Comments:
RI 1.5-1.6

Chemical Properties of Hisingerite

Formula:
Fe23+(Si2O5)(OH)4 · 2H2O
Essential elements:
All elements listed in formula:
Common Impurities:
Al,Mg,Ca

Relationship of Hisingerite to other Species

9.ED.05DickiteAl2(Si2O5)(OH)4
9.ED.05KaoliniteAl2(Si2O5)(OH)4
9.ED.05NacriteAl2(Si2O5)(OH)4
9.ED.05Odinite(Fe,Mg,Al,Fe,Ti,Mn)2.4((Si,Al)2O5)(OH)4
9.ED.10HalloysiteAl2(Si2O5)(OH)4
9.ED.10Halloysite-7ÅAl2(Si2O5)(OH)4
9.ED.15AmesiteMg2Al(AlSiO5)(OH)4
9.ED.15AntigoriteMg3(Si2O5)(OH)4
9.ED.15Berthierine(Fe2+,Fe3+,Al)3(Si,Al)2O5(OH)4
9.ED.15Brindleyite(Ni,Al)3(Si,Al)2O5(OH)4
9.ED.15Caryopilite(Mn,Mg)3(Si2O5)(OH)4
9.ED.15ChrysotileMg3(Si2O5)(OH)4
9.ED.15CronstedtiteFe22+Fe3+((Si,Fe3+)2O5)(OH)4
9.ED.15Fraipontite(Zn,Al)3((Si,Al)2O5)(OH)4
9.ED.15GreenaliteFe2-3(Si2O5)(OH)4
9.ED.15KellyiteMn22+Al(AlSiO5)(OH)4
9.ED.15LizarditeMg3(Si2O5)(OH)4
9.ED.15ManandoniteLi2Al4(Si2AlB)O10(OH)8
9.ED.15Népouite(Ni,Mg)3(Si2O5)(OH)4
9.ED.15PecoraiteNi3(Si2O5)(OH)4
9.ED.15GuidottiiteMn2Fe3+(Fe3+SiO5)(OH)4
9.ED.20Allophane(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
9.ED.20ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O (x < 1)
9.ED.20ImogoliteAl2SiO3(OH)4
9.ED.20Neotocite(Mn,Fe,Mg)SiO3 · H2O
9.ED.25BismutoferriteFe23+Bi(SiO4)2(OH)
9.ED.25ChapmaniteFe23+Sb3+(Si2O5)O3(OH)
14.19.1FayaliteFe22+SiO4
14.19.2FerrosiliteFeSiO3
14.19.3LaihuniteFe2+Fe23+(SiO4)2
14.19.4Ferro-anthophyllite☐{Fe22+}{Fe52+}(Si8O22)(OH)2
14.19.5FerripyrophylliteFe23+(Si4O10)(OH)2
14.19.6GreenaliteFe2-3(Si2O5)(OH)4
14.19.7CronstedtiteFe22+Fe3+((Si,Fe3+)2O5)(OH)4

Other Names for Hisingerite

Name in Other Languages:

Other Information

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Hisingerite

Reference List:
Whelan, J.A. and S.S. Goldich (1961): New data for hisingerite and neotocite. Amer. Mineral., 46, 1412-1423.

Clark, A.M., A.J. Easton, and M. Mount (1978): A study of the neotocite group. Mineral. Mag., 42, 279-280, M26-M27.

Eggleton, R.A., J.H. Pennington, R.S. Freeman, and I.M. Threadgold (1983): Structural aspects of the hisingerite-neotocite series. Clay Minerals, 18, 21-31.

Clays and Clay Minerals (1984): 32: 272.

Journal of the Czech Geological Society, Prague (1996): 41 (1-2), 7-14.

Clays and Clay Minerals, 46 (4), 400-413, 1998.

Internet Links for Hisingerite

Localities for Hisingerite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
Mineral and/or Locality  
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