Florensovite
A valid IMA mineral species
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About Florensovite
Nikolai A. Florensov
Formula:
(Cu,Zn)Cr1.5Sb0.5S4
Colour:
Black
Lustre:
Adamantine, Metallic
Hardness:
5
Specific Gravity:
4.28 (Calculated)
Crystal System:
Isometric
Member of:
Name:
Named in honor of Nikolai Aleksandrovich Florensov (Николай Александрович Флоренсов) (15 (28) January 1909, Kiev, Russian Empire (now Ukraine) – 21 April 1986, Irkutsk, USSR), geologist, Director of the Institute of the Earth’s Crust, Irkutsk, Russia.
Unique Identifiers
Mindat ID:
1563
Long-form identifier:
mindat:1:1:1563:5
IMA Classification of Florensovite
Approved
IMA Formula:
Cu1+(Cr3+1.5Sb5+0.5)S2-4
Approval year:
1987
First published:
1989
Approval history:
IMA1987-012
Classification of Florensovite
2.DA.05
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
D : Metal Sulfides, M: S = 3 :4 and 2:3
A : M:S = 3:4
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
D : Metal Sulfides, M: S = 3 :4 and 2:3
A : M:S = 3:4
2.10.1.14
2 : SULFIDES
10 : AmBnXp, with (m+n):p = 3:4
2 : SULFIDES
10 : AmBnXp, with (m+n):p = 3:4
5.4.2
5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
4 : Sulpharsenites etc. of Zn and Hg
5 : Sulphosalts - Sulpharsenites and Sulphobismuthites (those containing Sn, Ge,or V are in Section 6)
4 : Sulpharsenites etc. of Zn and Hg
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 for Standard |
|---|---|---|
| Frs | 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 Florensovite
Adamantine, Metallic
Transparency:
Opaque
Colour:
Black
Hardness:
5 on Mohs scale
Hardness:
VHN50=477 - 541 kg/mm2 - Vickers
Tenacity:
Brittle
Density:
4.28 g/cm3 (Calculated)
Optical Data of Florensovite
Reflectivity:
| Wavelength | R1 (%) |
|---|---|
| 440nm | 23.2% |
| 460nm | 24.5% |
| 480nm | 25.7% |
| 500nm | 26.4% |
| 520nm | 26.5% |
| 540nm | 26.5% |
| 560nm | 26.8% |
| 580nm | 27.0% |
| 600nm | 27.4% |
| 620nm | 27.5% |
| 640nm | 27.1% |
| 660nm | 26.6% |
| 680nm | 26.3% |
| 700nm | 26.2% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 27.5%.
Colour in reflected light:
pale creamy in reflected light
Chemistry of Florensovite
Mindat Formula:
(Cu,Zn)Cr1.5Sb0.5S4
Element Weights:
Crystallography of Florensovite
Crystal System:
Isometric
Class (H-M):
m3m(4/m32/m) - Hexoctahedral
Cell Parameters:
a = 10.005(6) Å
Unit Cell V:
1,001.50 ų (Calculated from Unit Cell)
Morphology:
Grains, to 0.8 mm, slaglike; as overgrowths on eskolaite–karelianite.
Comment:
by analogy to CuCr2S4 Fd3m
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.53 Å | (50) |
| 3.01 Å | (100) |
| 2.50 Å | (80) |
| 1.923 Å | (80) |
| 1.768 Å | (100) |
| 1.302 Å | (60) |
| 1.021 Å | (80) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 5: Initiation of plate tectonics | <3.5-2.5 |
| 40 : Regional metamorphism (greenschist, amphibolite, granulite facies) |
Type Occurrence of Florensovite
Place of Conservation of Type Material:
Central Siberian Geological Museum, Novosibirsk.
Mining Institute, St. Petersburg, Russia, 2077/1–2.
Mining Institute, St. Petersburg, Russia, 2077/1–2.
Synonyms of Florensovite
Other Language Names for Florensovite
Relationship of Florensovite to other Species
Member of:
Other Members of Carrollite Subgroup:
| Berndlehmannite | Cu(CrV)S4 | Iso. m3m(4/m32/m) : Fd3m |
| Carrollite | CuCo2S4 | Iso. m3m(4/m32/m) : Fd3m |
| Cuproiridsite | (Cu,Fe)Ir2S4 | Iso. m3m(4/m32/m) : Fd3m |
| Cuprokalininite | Cu(Cr3+Cr4+)S4 | Iso. m3m(4/m32/m) : Fd3m |
| Ezochiite | Cu+(Rh3+Pt4+)S4 | Iso. m3m(4/m32/m) : Fd3m |
| Fletcherite | CuNi2S4 | Iso. m3m(4/m32/m) : Fd3m |
| Malanite | Cu+(Ir3+Pt4+)S4 | Iso. m3m(4/m32/m) |
| Rhodostannite | Cu+(Fe2+0.5Sn4+1.5)S4 | Tet. 4/m : I41/a |
| Shiranuiite | Cu+(Rh3+Rh4+)S4 | Iso. m3m(4/m32/m) : Fd3m |
| Toyohaite | Ag+(Fe2+0.5Sn4+1.5)S4 | Tet. 4/m : I41/a |
| 'Unnamed (Fe3+-analogue of Fletcherite)' | Cu(Fe3+,Ni,Co)2S4 |
Common Associates
Associations Based on Photo Data:
| 1 photo of Florensovite associated with Diopside | CaMgSi2O6 |
| 1 photo of Florensovite associated with Kalininite | ZnCr2S4 |
Related Minerals - Strunz-mindat Grouping
| 2.DA. | Ferrodimolybdenite | FeMo2S4 |
| 2.DA. | Zaykovite | Rh3Se4 |
| 2.DA. | Ezochiite | Cu+(Rh3+Pt4+)S4 |
| 2.DA. | Grimmite | NiCo2S4 |
| 2.DA. | Zolenskyite | FeCr2S4 |
| 2.DA.05 | Shiranuiite | Cu+(Rh3+Rh4+)S4 |
| 2.DA.05 | Fletcherite | CuNi2S4 |
| 2.DA.05 | Siegenite | CoNi2S4 |
| 2.DA.05 | Cadmoindite | CdIn2S4 |
| 2.DA.05 | Kalininite | ZnCr2S4 |
| 2.DA.05 | Violarite | Fe2+Ni3+2S4 |
| 2.DA.05 | Nickeltyrrellite | CuNi2Se4 |
| 2.DA.05 | Linnaeite | Co2+Co3+2S4 |
| 2.DA.05 | Carrollite | CuCo2S4 |
| 2.DA.05 | Cuproiridsite | (Cu,Fe)Ir2S4 |
| 2.DA.05 | Cuprorhodsite | (Cu+0.5Fe3+0.5)Rh3+2S4 |
| 2.DA.05 | Berndlehmannite | Cu(CrV)S4 |
| 2.DA.05 | Polydymite | Ni2+Ni3+2S4 |
| 2.DA.05 | Trüstedtite | Ni3Se4 |
| 2.DA.05 | Daubréelite | Fe2+Cr3+2S4 |
| 2.DA.05 | Cuprokalininite | Cu(Cr3+Cr4+)S4 |
| 2.DA.05 | Greigite | Fe2+Fe3+2S4 |
| 2.DA.05 | Joegoldsteinite | MnCr2S4 |
| 2.DA.05 | Bornhardtite | Co2+Co3+2Se4 |
| 2.DA.05 | Tyrrellite | Cu(Co,Ni)2Se4 |
| 2.DA.05 | Indite | FeIn2S4 |
| 2.DA.05 | Xingzhongite | Pb2+Ir3+2S4 |
| 2.DA.05 | Malanite | Cu+(Ir3+Pt4+)S4 |
| 2.DA.10 | Rhodostannite | Cu+(Fe2+0.5Sn4+1.5)S4 |
| 2.DA.10 | Toyohaite | Ag+(Fe2+0.5Sn4+1.5)S4 |
| 2.DA.15 | Brezinaite | Cr3S4 |
| 2.DA.15 | Heideite | (Fe,Cr)1.15(Ti,Fe)2S4 |
| 2.DA.20 | Konderite | Cu3Pb(Rh,Pt,Ir)8S16 |
| 2.DA.20 | Inaglyite | Cu3Pb(Ir,Pt)8S16 |
| 2.DA.25 | Kingstonite | Rh3S4 |
Other Information
Notes:
Strongly magnetic
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 Florensovite
mindat.org URL:
https://www.mindat.org/min-1563.html
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References for Florensovite
Reference List:
Riedel, E., Karl, R., Rackwitz, R. (1981) Mössbauer studies of thiospinels. V. The systems Cu1−xFexMe2S4 (Me = Cr, Rh) and Cu1−xFexCr2(S0.7Se0.3)4. Journal of Solid State Chemistry, 40. 255-265 doi:10.1016/0022-4596(81)90390-x
Localities for Florensovite
Showing 2 localities.
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.
Russia | |
| Korinevsky et al. (2022) |
| Reznitskii et al. (1989) +1 other reference |
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Pereval marble quarry, Slyudyanka, Slyudyansky District, Irkutsk Oblast, Russia