Fibroferrite
A valid IMA mineral species - grandfathered
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About Fibroferrite
Formula:
Fe3+(SO4)(OH) · 5H2O
Colour:
Light yellow, golden yellow, nearly white, greenish grey, yellowish green, light green; colourless to faint yellow in transmitted light.
Lustre:
Silky, Pearly
Hardness:
2 - 2½
Specific Gravity:
1.84 - 2.1
Crystal System:
Trigonal
Member of:
Name:
In allusion to its common FIBROus habit of aggregation and the composition, containing iron (Latin = FERRum).
Type Locality:
This page provides mineralogical data about Fibroferrite.
Unique Identifiers
Mindat ID:
1544
Long-form identifier:
mindat:1:1:1544:4
GUID
(UUID V4):
(UUID V4):
fd0b911a-69f9-4592-bed3-1d19db46a5bf
IMA Classification of Fibroferrite
Approved, 'Grandfathered' (first described prior to 1959)
Classification of Fibroferrite
7.DC.15
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
C : With only medium-sized cations; chains of edge-sharing octahedra
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
C : With only medium-sized cations; chains of edge-sharing octahedra
31.9.12.1
31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
9 : (AB)(XO4)Zq·xH2O
31 : HYDRATED SULFATES CONTAINING HYDROXYL OR HALOGEN
9 : (AB)(XO4)Zq·xH2O
25.10.18
25 : Sulphates
10 : Sulphates of Fe alone
25 : Sulphates
10 : Sulphates of Fe alone
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Ffr | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Fibroferrite
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Fibroferrite
Silky, Pearly
Transparency:
Translucent
Comment:
Luster of aggregates.
Colour:
Light yellow, golden yellow, nearly white, greenish grey, yellowish green, light green; colourless to faint yellow in transmitted light.
Hardness:
2 - 2½ on Mohs scale
Cleavage:
Perfect
On {001}, perfect.
On {001}, perfect.
Density:
1.84 - 2.1 g/cm3 (Measured) 1.996 g/cm3 (Calculated)
Comment:
2.52 (value on Valachov material).
Optical Data of Fibroferrite
Type:
Uniaxial (+)
RI values:
nω = 1.532 nε = 1.570
Max Birefringence:
δ = 0.038
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Low
Pleochroism:
Visible
Comments:
X = Colourless
Y = Colourless
Z = c = Light golden yellow
Y = Colourless
Z = c = Light golden yellow
Chemistry of Fibroferrite
Mindat Formula:
Fe3+(SO4)(OH) · 5H2O
Elements listed:
Crystallography of Fibroferrite
Crystal System:
Trigonal
Class (H-M):
3 - Rhombohedral
Space Group:
R3
Cell Parameters:
a = 24.153(6) Å, c = 7.637(2) Å
Ratio:
a:c = 1 : 0.316
Unit Cell V:
3,858.30 ų (Calculated from Unit Cell)
Z:
18
Morphology:
Occurs as fine-fibrous crusts and masses; botryoidal; radial-fibrous structured. Fibers elongated [001].
Twinning:
Repeated on {110}, as triplets elongated [001].
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0015680 | Fibroferrite | Scordari F (1981) Fibroferrite: A mineral with a {Fe(OH)(H2O)2SO4} spiral chain and its relationship to Fe(OH)SO4, butlerite and parabutlerite Tschermaks Mineralogische und Petrographische Mitteilungen 28 17-29 | 1981 | Saint Felix de Pailleres, France | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 12.10 Å | (100) |
| 6.98 Å | (42) |
| 4.57 Å | (53) |
| 4.07 Å | (35) |
| 3.346 Å | (33) |
| 2.989 Å | (25) |
| 2.784 Å | (30) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 25 : Evaporites (prebiotic) | |
| Stage 7: Great Oxidation Event | <2.4 |
| 45a : [Sulfates, arsenates, selenates, antimonates] | |
| 47a : [Near-surface hydration of prior minerals] | |
| 47b : [Sulfates and sulfites] |
Geological Setting:
Areas experiencing the oxidation of pyrite.
Type Occurrence of Fibroferrite
Reference:
Rose H (1833) Ueber einige in Südamerika vorkommende eisenoxydsalze. Annalen der Physik und Chemie 27, 309-319
Synonyms of Fibroferrite
Other Language Names for Fibroferrite
Relationship of Fibroferrite to other Species
Common Associates
Associated Minerals Based on Photo Data:
| 7 photos of Fibroferrite associated with Copiapite | Fe2+Fe3+4(SO4)6(OH)2 · 20H2O |
| 7 photos of Fibroferrite associated with Voltaite | K2Fe2+5Fe3+3Al(SO4)12 · 18H2O |
| 4 photos of Fibroferrite associated with Magnesiocopiapite | MgFe3+4(SO4)6(OH)2 · 20H2O |
| 4 photos of Fibroferrite associated with Pickeringite | MgAl2(SO4)4 · 22H2O |
| 2 photos of Fibroferrite associated with Turquoise | CuAl6(PO4)4(OH)8 · 4H2O |
| 2 photos of Fibroferrite associated with Amarantite | Fe3+2(SO4)2O · 7H2O |
| 2 photos of Fibroferrite associated with Metahohmannite | Fe3+2(SO4)2O · 4H2O |
| 2 photos of Fibroferrite associated with Hedenbergite | CaFe2+Si2O6 |
| 2 photos of Fibroferrite associated with Römerite | Fe2+Fe3+2(SO4)4 · 14H2O |
| 2 photos of Fibroferrite associated with Rozenite | FeSO4 · 4H2O |
Related Minerals - Strunz-mindat Grouping
| 7.DC.05 | Aluminite | Al2(SO4)(OH)4 · 7H2O |
| 7.DC.05 | Meta-aluminite | Al2(SO4)(OH)4 · 5H2O |
| 7.DC.10 | Butlerite | Fe3+(SO4)(OH) · 2H2O |
| 7.DC.10 | Parabutlerite | Fe3+(SO4)(OH) · 2H2O |
| 7.DC.20 | Xitieshanite | Fe3+(SO4)Cl · 6H2O |
| 7.DC.25 | Botryogen | MgFe3+(SO4)2(OH) · 7H2O |
| 7.DC.25 | Zincobotryogen | (Zn,Mg,Mn2+)Fe3+(SO4)2(OH) · 7H2O |
| 7.DC.30 | Chaidamuite | ZnFe3+(SO4)2(OH) · 4H2O |
| 7.DC.30 | Guildite | CuFe3+(SO4)2(OH) · 4H2O |
| 7.DC.40 | Pauladamsite | Cu4(SeO3)(SO4)(OH)4 · 2H2O |
| 7.DC.45 | Riotintoite | Al(SO4)(OH) · 3H2O |
| 7.DC.50 | Thorneite | Pb6(Te6+2O10)(CO3)Cl2(H2O) |
| 7.DC.55 | Vendidaite | Al2(SO4)(OH)3Cl · 6H2O |
Other Information
Notes:
Decomposed by water, rendering an acidic solution and a brown precipitate of hydrated iron oxide. Raman bands [cm-1]: 3522, 3411, 3140 & some bands <1300
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Fibroferrite
mindat.org URL:
https://www.mindat.org/min-1544.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
Mineral Dealers:
References for Fibroferrite
Reference List:
Larsen, Esper S. (1921) The microscopic determination of the nonopaque minerals. Bulletin Vol. 679. US Geological Survey doi:10.3133/b679 p.75
Ventruti, Gennaro, Della Ventura, Giancarlo, Bellatreccia, Fabio, Lacalamita, Maria, Schingaro, Emanuela (2016) Hydrogen bond system and vibrational spectroscopy of the iron sulfate fibroferrite, Fe(OH)SO4·5H2O. European Journal of Mineralogy, 28 (5) 943-952 doi:10.1127/ejm/2016/0028-2571
Ventruti, Gennaro, Ventura, Giancarlo Della, Corriero, Nicola, Malferrari, Daniele, Gualtieri, Alessandro F., Susta, Umberto, Lacalamita, Maria, Schingaro, Emanuela (2016) In situ high-temperature X-ray diffraction and spectroscopic study of fibroferrite, FeOH(SO4)·5H2O. Physics and Chemistry of Minerals, 43 (8) 587-595 doi:10.1007/s00269-016-0819-4
Majzlan, Juraj, Dachs, Edgar, Benisek, Artur, Plášil, Jakub, Sejkora, Jiří (2018) Thermodynamics, crystal chemistry and structural complexity of the Fe(SO4)(OH)(H2O) x phases: Fe(SO4)(OH), metahohmannite, butlerite, parabutlerite, amarantite, hohmannite, and fibroferrite. European Journal of Mineralogy, 30 (2) 259-275 doi:10.1127/ejm/2017/0029-2677
Localities for Fibroferrite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Andorra | |
| Valenti Turu and Michels (1992) |
Antarctica | |
| Gore et al. (2000) |
| Vennum +1 other reference |
| Vennum +1 other reference | |
| Vennum (1986) |
Argentina | |
| Brotkorb (2002) |
| Palache et al. (1951) |
Australia | |
| |
| Prider (1944) +1 other reference |
Austria | |
| Meixner (1950) |
| Löffler et al. (1997) +2 other references |
| Kolitsch (2018) | |
| Palache et al. (1951) +1 other reference |
| |
Belgium | |
| Mélon et al. (1976) +1 other reference |
| Van Tassel (1956) +2 other references | |
| Van Tassel (1956) +2 other references |
Bolivia | |
| Wilson (2001) +1 other reference |
Brazil | |
| ATENCIO +2 other references |
Canada | |
| Lombardo (2010) |
| Palache et al. (1951) |
| Peatfield (n.d.) |
| Battler et al. (2013) |
| Zodrow et al. (1978) |
| Zodrow et al. (1978) |
| Lombardo (2010) |
| Izawa et al. (2011) |
| Osinski et al. (2005) | |
| SABINA (1968) |
Chile | |
| Kampf +4 other references |
| Uwe Kolitsch (single-crystal X-ray diffraction + SEM-EDS) | |
| Palache et al. (1951) |
| Palache et al. (1951) |
| Palache et al. (1951) +1 other reference |
China | |
| Bingbin Yang (1979) |
| Bingbin Yang (1979) | |
| Zhao +4 other references |
| Zhaolong Li et al. (1981) |
| Qingtong Ye (1983) |
| Minghua Zheng et al. (2002) +1 other reference |
| Huaqin Li and Fuwen Chen (2003) |
Cyprus | |
| Palache et al. (1951) +1 other reference |
Czech Republic | |
| Duda +1 other reference |
| Matýsek et al. (2023) |
| Žáček |
| Prachař +6 other references |
| Kouřimský +1 other reference |
France | |
| A. Wittern et al. (Cologne) |
| Palache et al. (1951) |
| Lombardo (2010) | |
Germany | |
| T. Witzke & F. Rüger: Lapis 1998 (7/8) |
| Liebeskind et al. (1992) |
Greece | |
| Meixner (1978) |
| Rieck et al. (2018) | |
| Uwe Kolitsch (PXRD-analysed) |
| Branko Rieck collection | |
| Branko Rieck collection |
| Branko Rieck collection +1 other reference | |
Greenland | |
| Jakobsen (1989) |
Hungary | |
| Szakáll: Minerals of Rudabánya |
| Sánoor Szakáll et al. (1997) | |
| KOVÁCS-PÁLFFY (2005) |
Italy | |
| Russo et al. (2017) |
| Barrese et al. (1994) |
| Balestra C. (2013) |
| P. Mattias- M. Guerra (2008) |
| Nannoni R. |
| Brizzi G. et al. (GR) | |
| Palache et al. (1951) |
| Barsotti et al. (2006) | |
| E. Manasse (Isola d'Elba) |
| E. Manasse +1 other reference |
| Biagioni et al. (2011) +1 other reference |
| Mauro D. (2016) | |
| Mineralogical Record (1) +3 other references |
| Forti P. (1988) |
Japan | |
| Sakurai & Ashizawa (1954) |
Nicaragua | |
| Hynek et al. (2013) |
| Hynek et al. (2013, March) +1 other reference |
North Macedonia | |
| Rieck (1993) +1 other reference |
| Boev et al. (2015) | |
Norway | |
| Raade (1971) +1 other reference |
| Neumann (1985) |
Peru | |
| Uwe Kolitsch (powder X-ray diffraction and SEM-EDS) |
| Smuda +4 other references |
Poland | |
| Siuda (2004) +1 other reference |
| Balcerzak et al. (1992) | |
| Mochnacka et al. (2015) | |
Portugal | |
| Miguel Rocha's mineral collection +1 other reference |
| Pedro Alves collection and analytical ... | |
Romania | |
| Edited by Szakáll-Kristály (2010) |
| Ł. Kruszewski & M. Cegiełka PXRD data +1 other reference |
Russia | |
| webmineral.ru (2016) |
| Palache et al. (1951) |
| Zhdanov Yu.Ya. (1998) |
Slovakia | |
| Ďuďa R. et al. (Schemnitz) |
| Koděra (1986) |
| Koděra (1986) |
| Koděra (1986) |
Spain | |
| Calvo Rebollar et al. (2022) |
| Bareche (2005) |
| Crespo et al. (2017) |
Switzerland | |
| Stalder et al. (1998) |
| Stalder et al. (1998) |
| Stalder et al. (1998) +1 other reference |
| Stalder et al. (1998) |
UK | |
| BMS Collection |
Ukraine | |
| Alexander I. Tischenko (1996) |
| Möckel et al. (1992) |
USA | |
| Anthony et al. (1995) |
| Anthony et al. (1995) | |
| Yale Peabody Museum |
| Lombardo (2010) |
| Van Nostrand Reinholt Press: 273. +3 other references |
| www.mineralsocal.org |
| Palache et al. (1951) | |
| Forrest Cureton specimens |
| part 2 +4 other references | |
| Van Nostrand Reinholt Press: 273 +5 other references |
| Dana 6:1089. |
| Eckel et al. (1997) | |
| Castor et al. (2004) |
| Castor et al. (2004) |
| Castor et al. (2004) |
| Castor et al. (2004) |
| Northrop et al. (1996) | |
| Bullock (1981) +1 other reference |
| Rosenzweig et al. (1955) | |
| Bullock (1981) | |
| Dietrich (1990) |
Mars | |
| Johnson et al. (2007) +1 other reference |
| Johnson et al. (2007) +1 other reference |
| Johnson et al. (2007) +1 other reference |
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Alcaparrosa Mine, Sierra Gorda, Antofagasta Province, Antofagasta, Chile