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Topsøeite

A valid IMA mineral species
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08233820017272472978705.jpg
Haldor Frederik Axel Topsøe
Formula:
FeF[F0.5(H2O)0.5]4 · H2O
Colour:
Yellow
Specific Gravity:
2.330 (Calculated)
Crystal System:
Tetragonal
Name:
Named in the honor of the Danish Topsøe family, including the chemist and crystallographer Haldor Frederik Axel Topsøe (29 April 1842 in Skælskør, Slagelse Municipality, Denmark – 31 December 1935 in Frederiksberg, Denmark), and his son Haldor Topsøe (1913-2013), an engineer and founder of the catalysis company Haldor Topsøe, and his grandson Henrik Topsøe (1944 - ).
Isostructural with:
Rosenbergite
The Fe3+ analogue of Rosenbergite. The first iron fluoride mineral.


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Name EncodingHide

ASCII-7:
Topsoeite

Unique IdentifiersHide

Mindat ID:
51561
Long-form identifier:
mindat:1:1:51561:4

Similar NamesHide

TopaziteA rock subtype

IMA Classification of TopsøeiteHide

Classification of TopsøeiteHide

Strunz-mindat (2026):
3.CD.05

3 : HALIDES
C : Complex halides
D : Ino-aluminofluorides

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
TopIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of TopsøeiteHide

Colour:
Yellow
Density:
2.330 g/cm3 (Calculated)

Chemistry of TopsøeiteHide

Mindat Formula:
FeF[F0.5(H2O)0.5]4 · H2O
Element Weights:
Element% weight
Fe60.140 %
F20.460 %
O17.230 %
H2.171 %

Calculated from ideal end-member formula.
Fe
F
O
H
Elements listed:
F, Fe, H, O - search for minerals with similar chemistry

Crystallography of TopsøeiteHide

Crystal System:
Tetragonal
Class (H-M):
4/m - Dipyramidal
Space Group:
P4/n
Setting:
P4/n
Cell Parameters:
a = 7.8384(4) Å, c = 3.8718(2) Å
Ratio:
a:c = 1 : 0.494
Unit Cell V:
237.6 ų

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 7: Great Oxidation Event<2.4
45b : [Other oxidized fumarolic minerals]

Type Occurrence of TopsøeiteHide

Type Locality:
ⓘ Hekla, Rangárþing ytra, Southern Region, Iceland
General Appearance of Type Material:
Square-prismatic crystals to 20 µm forming occasional stepped aggregates. Massive veins to 100 µm wide.
Place of Conservation of Type Material:
Mineralogical collections of the Icelandic Institute of Natural History, Gardabaer, Iceland (sample number NI 15515)
Associated Minerals at Type Locality:
HematiteOpal
Reference:
Balić-Žunić, Tonči, Garavelli, Anna, Mitolo, Donatella (2018) Topsøeite, FeF3(H2O)3, a new fumarolic mineral from the Hekla Volcano, Iceland. European Journal of Mineralogy, 30 (4) 841-848 doi:10.1127/ejm/2018/0030-2751

Synonyms of TopsøeiteHide

Other Language Names for TopsøeiteHide

German:Topsøeit

Related Minerals - Strunz-mindat GroupingHide

3.CD.05RosenbergiteAlF[F0.5(H2O)0.5]4 · H2OTet. 4/m : P4/n
3.CD.10ProsopiteCaAl2F4[(OH)4-xFx]Mon. 2/m : B2/b
3.CD.15JakobssoniteCaAlF5Mon. 2/m : B2/b

Other InformationHide

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 TopsøeiteHide

References for TopsøeiteHide

Localities for TopsøeiteHide

Showing 2 localities.

This 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.
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Locality ListHide

- 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Iceland (TL)
 
  • Southern Region
    • Rangárþing ytra
Mineralogical Magazine +2 other references
Italy
 
  • Campania
    • Metropolitan City of Naples
Russo et al. (2022)
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