Evseevite
A valid IMA mineral species
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About Evseevite
Formula:
Na2Mg(AsO4)F
Colour:
Colourless or pale pinkish
Lustre:
Vitreous
Specific Gravity:
3.377 (Calculated)
Crystal System:
Orthorhombic
Name:
It is named in honour of the Russian mineralogist Aleksandr Andreevich Evseev (born 1949) who works in Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow. He is a specialist in history of mineralogy and an application of geographical information in mineralogy.
Type Locality:
Isostructural with:
The arsenate (or arsenic) analogue of moraskoite. Chemically somewhat related to polyarsite and nanlingite.
Evseevite is represented by two chemical varieties. The variety close to the end-member Na2Mg(AsO4)F gave the specimen considered as the holotype (sample #63281): all complex of studies was carried out for this variety, including the crystal structure determination. The variety enriched with admixed P and S, which partially substitute As, is considered as the cotype (#6260): scanning electron microscopy (SEM), electron microprobe analysis (EMPA) and powder X-ray diffraction (XRD) study were performed for this variety.
Evseevite is represented by two chemical varieties. The variety close to the end-member Na2Mg(AsO4)F gave the specimen considered as the holotype (sample #63281): all complex of studies was carried out for this variety, including the crystal structure determination. The variety enriched with admixed P and S, which partially substitute As, is considered as the cotype (#6260): scanning electron microscopy (SEM), electron microprobe analysis (EMPA) and powder X-ray diffraction (XRD) study were performed for this variety.
Unique Identifiers
Mindat ID:
54029
Long-form identifier:
mindat:1:1:54029:4
GUID
(UUID V4):
(UUID V4):
2ab8bf5f-319d-46a3-a039-96101e5f0014
IMA Classification of Evseevite
Approved, Pending publication
Classification of Evseevite
8.BH.80
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
H : With medium-sized and large cations, (OH,etc.):RO4 = 1:1
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
H : With medium-sized and large cations, (OH,etc.):RO4 = 1:1
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 |
|---|---|---|
| Evs | 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 Evseevite
Vitreous
Transparency:
Transparent
Colour:
Colourless or pale pinkish
Streak:
White
Tenacity:
Brittle
Cleavage:
None Observed
Parting:
none
Fracture:
Irregular/Uneven
Density:
3.377 g/cm3 (Calculated)
Comment:
Dcalc is 3.377 g cm-3 for holotype and 3.226 g cm-3 for cotype.
Optical Data of Evseevite
Type:
Uniaxial (+)
RI values:
nα = 1.545(2) nβ = 1.546(2) nγ = 1.549(2)
2V:
Measured: 40° (10), Calculated: 60°
Max Birefringence:
δ = 0.004
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
Optical Extinction:
straight
Pleochroism:
Non-pleochroic
Chemistry of Evseevite
Mindat Formula:
Na2Mg(AsO4)F
Chemical Analysis
Empirical formulas:
| Sample ID | Empirical Formula |
|---|---|
| 1 | (1) (Na1.99Ca0.03K0.01)?2.03(Mg0.98Fe3+0.01Zn0.01Cu0.01)?1.01[(As0.98Si0.01)?1.01O4](F0.97O0.03); (2) Na2.02(Mg1.00Fe3+0.03)?1.03[(As0.69P0.25S0.07)?1.01O4](F0.78O0.22) |
Sample references:
| ID | Locality | Reference | Notes |
|---|---|---|---|
| 1 | Arsenatnaya fumarole, Second scoria cone, Northern Breakthrough, Great Fissure eruption, Tolbachik Volcanic field, Milkovsky District, Kamchatka Krai, Russia | Pekov, Igor V., Yapaskurt, Vasiliy O., Britvin, Sergey N., Zubkova, Natalia V., Vigasina, Marina F., Sidorov, Evgeny G. (2016) New arsenate minerals from the Arsenatnaya fumarole, Tolbachik volcano, Kamchatka, Russia. V. Katiarsite, KTiO(AsO4) Mineralogical Magazine, 80 (4) 639-646 doi:10.1180/minmag.2016.080.007 | by EPMA (WDS); (1) = holotype, (2) = cotype (there are two varieties, the holotype-one is more pure); empirical formula basis: O+F = 5 apfu |
Crystallography of Evseevite
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pbcn
Setting:
Pbcn
Cell Parameters:
a = 5.3223(1) Å, b = 14.1255(3) Å, c = 12.0047(3) Å
Ratio:
a:b:c = 0.377 : 1 : 0.85
Unit Cell V:
902.52 ų (Calculated from Unit Cell)
Z:
8
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.001 Å | (100) |
| 3.527 Å | (31) |
| 3.479 Å | (56) |
| 3.041 Å | (45) |
| 2.998 Å | (29) |
| 2.657 Å | (44) |
| 2.642 Å | (68) |
| 2.613 Å | (36) |
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 Evseevite
General Appearance of Type Material:
Prismatic, acicular or hair-like crystals up to 0.7 mm long combined in clusters up to 0.5 mm, brushes or crusts up to 2 × 2 mm.
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 5418/1.
Geological Setting of Type Material:
High temperature fumerole.
Associated Minerals at Type Locality:
Related Minerals - Strunz-mindat Grouping
| 8.BH. | Crimsonite | PbFe3+2(PO4)2(OH)2 |
| 8.BH. | Reznitskyite | CaMg(VO4)F |
| 8.BH. | Cuprozheshengite | Pb4CuZn2(AsO4)2(PO4)2(OH)2 |
| 8.BH. | Zheshengite | Pb4ZnZn2(AsO4)2(PO4)2(OH)2 |
| 8.BH. | Peterchinite | Zn3Zn2(OH)6As[O3(OH)3] |
| 8.BH.05 | Thadeuite | Ca(Mg,Fe2+)3(PO4)2(OH,F)2 |
| 8.BH.10 | Durangite | NaAl(AsO4)F |
| 8.BH.10 | Isokite | CaMg(PO4)F |
| 8.BH.10 | Lacroixite | NaAl(PO4)F |
| 8.BH.10 | Maxwellite | NaFe3+(AsO4)F |
| 8.BH.10 | Panasqueiraite | CaMg(PO4)(OH,F) |
| 8.BH.10 | Kononovite | NaMg(SO4)F |
| 8.BH.10 | Arsenatrotitanite | NaTi(AsO4)O |
| 8.BH.15 | Drugmanite | Pb2(Fe3+,Al)(PO4)(PO3OH)(OH)2 |
| 8.BH.20 | Bjarebyite | (Ba,Sr)(Mn2+,Fe2+,Mg)2Al2(PO4)3(OH)3 |
| 8.BH.20 | Cirrolite | Ca3Al2(PO4)3(OH)3 (?) |
| 8.BH.20 | Kulanite | Ba(Fe2+,Mn2+,Mg)2(Al,Fe3+)2(PO4)3(OH)3 |
| 8.BH.20 | Penikisite | Ba(Mg,Fe2+,Ca)2Al2(PO4)3(OH)3 |
| 8.BH.20 | Perloffite | Ba(Mn2+,Fe2+)2Fe3+2(PO4)3(OH)3 |
| 8.BH.20 | Johntomaite | BaFe2+2Fe3+2(PO4)3(OH)3 |
| 8.BH.20 | Bjarebyite Group | |
| 8.BH.20 | Strontioperloffite | SrMn2+2Fe3+2(PO4)3(OH)3 |
| 8.BH.20 | Plumboperloffite | PbMn2+2Fe3+2(PO4)3(OH)3 |
| 8.BH.25 | Bertossaite | (Li,Na)2(Ca,Fe2+,Mn2+)Al4(PO4)4(OH,F)4 |
| 8.BH.25 | Palermoite | (Li,Na)2(Sr,Ca)Al4(PO4)4(OH)4 |
| 8.BH.25 | Natropalermoite | Na2SrAl4(PO4)4(OH)4 |
| 8.BH.30 | Carminite | PbFe3+2(AsO4)2(OH)2 |
| 8.BH.30 | Sewardite | CaFe3+2(AsO4)2(OH)2 |
| 8.BH.35 | Adelite | CaMg(AsO4)(OH) |
| 8.BH.35 | Arsendescloizite | PbZn(AsO4)(OH) |
| 8.BH.35 | Austinite | CaZn(AsO4)(OH) |
| 8.BH.35 | Cobaltaustinite | CaCo(AsO4)(OH) |
| 8.BH.35 | Conichalcite | CaCu(AsO4)(OH) |
| 8.BH.35 | Duftite | PbCu(AsO4)(OH) |
| 8.BH.35 | Gabrielsonite | PbFe3+(As3+O3)O |
| 8.BH.35 | Nickelaustinite | CaNi(AsO4)(OH) |
| 8.BH.35 | Tangeite | CaCu(VO4)(OH) |
| 8.BH.35 | Duftite-alpha | PbCu(AsO4)(OH) |
| 8.BH.35 | Gottlobite | CaMg(VO4)(OH) |
| 8.BH.35 | Hermannroseite | CaCu(PO4)(OH) |
| 8.BH.40 | Čechite | PbFe2+(VO4)(OH) |
| 8.BH.40 | Descloizite | PbZn(VO4)(OH) |
| 8.BH.40 | Mottramite | PbCu(VO4)(OH) |
| 8.BH.40 | Pyrobelonite | PbMn2+(VO4)(OH) |
| 8.BH.40 | Khorixasite | (Bi0.67◻0.33)Cu(VO4)(OH) |
| 8.BH.45 | Bayldonite | PbCu3(AsO4)2(OH)2 |
| 8.BH.45 | Vésigniéite | BaCu3(VO4)2(OH)2 |
| 8.BH.50 | Paganoite | NiBi(AsO4)O |
| 8.BH.55 | Harrisonite | Ca(Fe2+,Mg)6(PO4)2(SiO4)2 |
| 8.BH.55 | Jagowerite | BaAl2(PO4)2(OH)2 |
| 8.BH.60 | Attakolite | CaMn2+Al4(SiO3OH)(PO4)3(OH)4 |
| 8.BH.65 | Leningradite | PbCu3(VO4)2Cl |
| 8.BH.70 | Katiarsite | KTiO(AsO4) |
| 8.BH.70 | Yurgensonite | K2SnTiO2(AsO4)2 |
| 8.BH.75 | Melanarsite | K3Cu7Fe3+O4(AsO4)4 |
| 8.BH.80 | Moraskoite | Na2Mg(PO4)F |
| 8.BH.85 | Piccoliite | NaCaMn3+2(AsO4)2O(OH) |
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 Evseevite
mindat.org URL:
https://www.mindat.org/min-54029.html
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References for Evseevite
Reference List:
Pekov, I. V., Zubkova, N. V., Agakhanov, A. A., Belakovskiy, D. I., Vigasina, M. F., Yapaskurt, V. O., Britvin, S. N., Turchkova, A. G., Sidorov, E. G., Pushcharovsky, D. Y. (2019) CNMNC Newsletter No. 52, New minerals and nomenclature modifications approved in 2019. Mineralogical Magazine, 83 (6) 887-893 doi:10.1180/mgm.2019.73
Localities for Evseevite
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 (TL) | |
| Pekov +2 other references |
Quick NavTopAbout EvseeviteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Chemical AnalysisCrystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence Strunz-MindatOther InformationInternet Links References Localities Locality List
Arsenatnaya fumarole, Second scoria cone, Northern Breakthrough, Great Fissure eruption, Tolbachik Volcanic field, Milkovsky District, Kamchatka Krai, Russia