Ferroefremovite
A valid IMA mineral species
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Formula:
(NH4)2Fe2+2(SO4)3
Colour:
Colorless
Lustre:
Vitreous
Hardness:
2
Specific Gravity:
2.69
Crystal System:
Isometric
Member of:
Name:
Named for being the Fe analogue of efremovite.
Unique Identifiers
Mindat ID:
53673
Long-form identifier:
mindat:1:1:53673:2
GUID
(UUID V4):
(UUID V4):
8a562fb9-f23f-42b1-b679-90b76f51c14f
IMA Classification of Ferroefremovite
Approved
Approval year:
2019
First published:
2021
Classification of Ferroefremovite
7.AC.10
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
A : Sulfates (selenates, etc.) without additional anions, without H2O
C : With medium-sized and large cations
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
A : Sulfates (selenates, etc.) without additional anions, without H2O
C : With medium-sized and large cations
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 |
---|---|---|
Fefr | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Ferroefremovite
Vitreous
Transparency:
Transparent
Colour:
Colorless
Streak:
White
Hardness:
2 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Parting:
None
Fracture:
Irregular/Uneven
Density:
2.69(1) g/cm3 (Measured) 2.700 g/cm3 (Calculated)
Optical Data of Ferroefremovite
Type:
Isotropic
RI values:
n = 1.574(3)
Birefringence:
Isotropic minerals have no birefringence
Surface Relief:
Low
Pleochroism:
Non-pleochroic
Chemistry of Ferroefremovite
Mindat Formula:
(NH4)2Fe2+2(SO4)3
Crystallography of Ferroefremovite
Crystal System:
Isometric
Class (H-M):
2 3 - Tetartoidal
Space Group:
P21 3
Cell Parameters:
a = 10.0484(9) Å
Unit Cell V:
1014.59 ų
Z:
4
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
5.80 Å | (40) |
4.50 Å | (20) |
4.11 Å | (30) |
3.17 Å | (100) |
3.02 Å | (20) |
2.68 Å | (50) |
1.86 Å | (18) |
1.62 Å | (18) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
45a : [Sulfates, arsenates, selenates, antimonates] | |
45b : [Other oxidized fumarolic minerals] |
Type Occurrence of Ferroefremovite
General Appearance of Type Material:
Cubic crystals up to 0.1 mm across.
Place of Conservation of Type Material:
collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5368/1
Geological Setting of Type Material:
Fumarole
Associated Minerals at Type Locality:
Reference:
Kasatkin A.V., Plášil J., Škoda R., Campostrini I., Chukanov N.V., Agakhanov A.A., Karpenko V.Y. and Belakovskiy D.I. (2021) Ferroefremovite, (NH4)2Fe2+2(SO4)3, a new mineral from Solfatara di Pozzuoli, Campania, Italy. The Canadian Mineralogist: 59(1): 59–68.
Synonyms of Ferroefremovite
Relationship of Ferroefremovite to other Species
Member of:
Other Members of this group:
Calciolangbeinite | K2Ca2(SO4)3 | Iso. 2 3 : P21 3 |
Efremovite | (NH4)2Mg2(SO4)3 | Iso. 2 3 : P21 3 |
Langbeinite | K2Mg2(SO4)3 | Iso. 2 3 : P21 3 |
Manganolangbeinite | K2Mn2(SO4)3 | Iso. 2 3 : P21 3 |
Related Minerals - Strunz-mindat Grouping
7.AC. | Aluminopyracmonite | (NH4)3Al(SO4)3 |
7.AC. | Amgaite | Tl+32Te6+O6 |
7.AC.05 | Vanthoffite | Na6Mg(SO4)4 |
7.AC.08 | Pyracmonite | (NH4)3Fe(SO4)3 |
7.AC.10 | Efremovite | (NH4)2Mg2(SO4)3 |
7.AC.10 | Langbeinite | K2Mg2(SO4)3 |
7.AC.10 | Manganolangbeinite | K2Mn2(SO4)3 |
7.AC.15 | Yavapaiite | KFe(SO4)2 |
7.AC.15 | Eldfellite | NaFe3+(SO4)2 |
7.AC.20 | Godovikovite | (NH4)Al(SO4)2 |
7.AC.20 | Sabieite | (NH4)Fe3+(SO4)2 |
7.AC.20 | Steklite | KAl(SO4)2 |
7.AC.35 | Aphthitalite | (K,Na)3Na(SO4)2 |
7.AC.35 | Möhnite | (NH4)K2Na(SO4)2 |
7.AC.35 | Belomarinaite | KNa(SO4) |
7.AC.35 | Natroaphthitalite | KNa3(SO4)2 |
7.AC.40 | Itelmenite | Na4Mg3Cu3(SO4)8 |
7.AC.45 | Saranchinaite | Na2Cu(SO4)2 |
7.AC.50 | Majzlanite | K2Na(ZnNa)Ca(SO4)4 |
7.AC.60 | Philoxenite | (K,Na,Pb)4(Na,Ca)2(Mg,Cu)3(Fe3+0.5Al0.5)(SO4)8 |
7.AC.75 | Petrovite | Na12Cu2(SO4)8 |
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 Ferroefremovite
mindat.org URL:
https://www.mindat.org/min-53673.html
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References for Ferroefremovite
Localities for Ferroefremovite
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.
Italy (TL) | |
| Kasatkin A.V. et al. (2021) |
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