Rosenbergite
A valid IMA mineral species
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About Rosenbergite
Formula:
AlF[F0.5(H2O)0.5]4 · H2O
May also be given as AlF3·3H2O.
Colour:
Colorless
Lustre:
Vitreous
Hardness:
3 - 3½
Specific Gravity:
2.1
Crystal System:
Tetragonal
Name:
Named in 1993 for Philip E. Rosenberg (b. 1931), geochemist at Washington State University, USA. He was the first to take note of the mineral.
Isostructural with:
The Al analogue of topsøeite. A hydrated counterpart of oskarssonite. Probably identical to UM2008-27-F:AlHO.
Found as aggregates of minute colorless crystals.
Compare 'UM1988-02-F:AlHO' (a lower-hydrate counterpart) and 'Unnamed (Basic Aluminium Fluoride Monohydrate)'.
Found as aggregates of minute colorless crystals.
Compare 'UM1988-02-F:AlHO' (a lower-hydrate counterpart) and 'Unnamed (Basic Aluminium Fluoride Monohydrate)'.
Unique Identifiers
Mindat ID:
3453
Long-form identifier:
mindat:1:1:3453:7
GUID
(UUID V4):
(UUID V4):
17910706-d9f8-4f99-91fa-99b49812f6f6
IMA Classification of Rosenbergite
Approved
IMA Formula:
AlF[F0.5(H2O)0.5]4 · H2O
Approval year:
1992
First published:
1993
Classification of Rosenbergite
3.CD.05
3 : HALIDES
C : Complex halides
D : Ino-aluminofluorides
3 : HALIDES
C : Complex halides
D : Ino-aluminofluorides
Dana 7th ed.:
9.3.6.1
9.3.6.1
9 : NORMAL HALIDES
3 : AX3
9 : NORMAL HALIDES
3 : AX3
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 |
---|---|---|
Ros | 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 Rosenbergite
Pronunciation:
Play | Recorded by | Country |
---|---|---|
Jolyon Ralph | United Kingdom |
Physical Properties of Rosenbergite
Vitreous
Transparency:
Transparent
Colour:
Colorless
Streak:
Colroless
Hardness:
3 - 3½ on Mohs scale
Hardness:
VHN15=103 kg/mm2 - Vickers
Hardness Data:
Measured
Tenacity:
Brittle
Cleavage:
Distinct/Good
Good on {001}.
Good on {001}.
Fracture:
Irregular/Uneven
Density:
2.1 g/cm3 (Measured) 2.111 g/cm3 (Calculated)
Optical Data of Rosenbergite
Type:
Uniaxial (-)
RI values:
nω = 1.427 nε = 1.403
Max Birefringence:
δ = 0.024
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:
Moderate
Chemistry of Rosenbergite
Mindat Formula:
AlF[F0.5(H2O)0.5]4 · H2O
May also be given as AlF3·3H2O.
May also be given as AlF3·3H2O.
Elements listed:
Crystallography of Rosenbergite
Crystal System:
Tetragonal
Class (H-M):
4/m - Dipyramidal
Space Group:
P4/n
Cell Parameters:
a = 7.715 Å, c = 3.648 Å
Ratio:
a:c = 1 : 0.473
Unit Cell V:
217.13 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Tetragonal prisms approx. 0.25 mm in size; found as aggregates of microscopic crystals.
Twinning:
None reported.
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) |
---|---|---|---|---|---|---|---|
0006508 | Rosenbergite | Olmi F, Sabelli C, Trosti-Ferroni R (1993) Rosenbergite, AlF[F0.5(H2O)0.5}4.H2O, a new mineral from the Cetine mine (Tuscany, Italy): description and crystal structure European Journal of Mineralogy 5 1167-1174 | 1993 | Cetine mine, Tuscany, Italy | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
5.47 Å | (100) |
2.44 Å | (70) |
2.03 Å | (70) |
1.775 Å | (80) |
1.725 Å | (90) |
1.388 Å | (70) |
1.306 Å | (70) |
1.127 Å | (70) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Near-surface Processes | |
23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) | |
Stage 7: Great Oxidation Event | <2.4 |
45b : [Other oxidized fumarolic minerals] |
Type Occurrence of Rosenbergite
General Appearance of Type Material:
radiating tufts
Place of Conservation of Type Material:
University of Florence, Florence, Italy, 1934/RI
Geological Setting of Type Material:
In cavities in highly silicified limestones at the Cetine Mine, Tuscany, Itally; and as a sublimate from fumaroles in the crater of Mt. Erebus, Ross Island, Antarctica (Co-Type Localities.0
Reference:
Olmi, F., Sabelli, C., Trosti-Ferroni, R. (1993) Rosenbergite, AlF[F0.5(H2O)0.5]4•H2O, a new mineral from the Cetine Mine (Tuscany, Italy): description and crystal structure. European Journal of Mineralogy: 5: 1167-1174.
Synonyms of Rosenbergite
Other Language Names for Rosenbergite
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
3.CD.05 | Topsøeite | FeF[F0.5(H2O)0.5]4 · H2O |
3.CD.10 | Prosopite | CaAl2F4[(OH)4-xFx] |
3.CD.15 | Jakobssonite | CaAlF5 |
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.
Internet Links for Rosenbergite
mindat.org URL:
https://www.mindat.org/min-3453.html
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Please feel free to link to this page.
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References for Rosenbergite
Localities for Rosenbergite
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).
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.
All localities listed without proper references should be considered as questionable.
Antarctica | |
| 1. Rosenberg (1988) +1 other reference |
Germany | |
| Collected and analysed by Günter Blaß +1 other reference |
Iceland | |
| Jacobsen et al. (2014) |
Italy | |
| Russo et al. (2022) |
| Olmi et al. (1993) +1 other reference |
Poland | |
| Kruszewski et al. (2019) |
Russia | |
| Damdinova et al. (2021) |
Quick NavTopAbout RosenbergiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPronunciation Physical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Le Cetine di Cotorniano Mine, Chiusdino, Siena Province, Tuscany, Italy