Polyarsite
A valid IMA mineral species
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About Polyarsite
Formula:
Na7CaMgCu2(AsO4)4F2Cl
Crystal System:
Monoclinic
Name:
"poly" means "many": the mineral is named to address its being an arsenate of many elements
New structure type. Unique combination of elements.
Unique Identifiers
Mindat ID:
54025
Long-form identifier:
mindat:1:1:54025:8
GUID
(UUID V4):
(UUID V4):
1a2caf22-8745-4145-a091-c2601042157e
IMA Classification of Polyarsite
Approved, Pending publication
Classification of Polyarsite
8.BG.35
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
G : With medium-sized and large cations, (OH, etc.):RO4 = 0.5:1
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
G : With medium-sized and large cations, (OH, etc.):RO4 = 0.5:1
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 |
---|---|---|
Par | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Chemistry of Polyarsite
Mindat Formula:
Na7CaMgCu2(AsO4)4F2Cl
Crystallography of Polyarsite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 8.4323(4) Å, b = 10.0974(4) Å, c = 10.7099(6) Å
β = 90.822(4)°
β = 90.822(4)°
Ratio:
a:b:c = 0.835 : 1 : 1.061
Unit Cell V:
911.79 ų (Calculated from Unit Cell)
Comment:
The space group is I2/m
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
5.357 Å | (98) |
4.218 Å | (48) |
3.304 Å | (49) |
3.127 Å | (68) |
2.783 Å | (61) |
2.757 Å | (100) |
2.704 Å | (54) |
2.679 Å | (61) |
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 Polyarsite
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 5417/1
Common Associates
Associated Minerals Based on Photo Data:
1 photo of Polyarsite associated with Cassiterite | SnO2 |
1 photo of Polyarsite associated with Hematite | Fe2O3 |
Related Minerals - Strunz-mindat Grouping
8.BG. | Canosioite | Ba2Fe3+(AsO4)2(OH) |
8.BG. | Aldomarinoite | Sr2Mn3+(AsO4)2(OH) |
8.BG. | Dongchuanite | Pb4ZnZn2(PO4)4(OH)2 |
8.BG. | Cuprodongchuanite | Pb4CuZn2(PO4)4(OH)2 |
8.BG.05 | Arsentsumebite | Pb2Cu(AsO4)(SO4)(OH) |
8.BG.05 | Bearthite | Ca2Al(PO4)2(OH) |
8.BG.05 | Brackebuschite | Pb2Mn3+(VO4)2(OH) |
8.BG.05 | Gamagarite | Ba2Fe3+(VO4)2(OH) |
8.BG.05 | Goedkenite | Sr2Al(PO4)2(OH) |
8.BG.05 | UM1994-19-PO:CuHMoPb | Pb2Cu(PO4)(MoO4,AsO4,CrO4,GaO4)(OH) |
8.BG.05 | Tsumebite | Pb2Cu(PO4)(SO4)(OH) |
8.BG.05 | Arsenbrackebuschite | Pb2Fe3+(AsO4)2(OH) |
8.BG.05 | Feinglosite | Pb2Zn(AsO4)2 · H2O |
8.BG.05 | Bushmakinite | Pb2Al(PO4)(VO4)(OH) |
8.BG.05 | Tokyoite | Ba2Mn3+(VO4)2(OH) |
8.BG.05 | Calderónite | Pb2Fe3+(VO4)2(OH) |
8.BG.05 | Ferribushmakinite | Pb2Fe3+(PO4)(VO4)(OH) |
8.BG.05 | Lombardoite | Ba2Mn3+(AsO4)2(OH) |
8.BG.05 | Unnamed (possible ordered As-analogue of Tokyoite) | Ba2Mn[(As,V)O4]2(OH) |
8.BG.10 | Mélonjosephite | CaFe2+Fe3+(PO4)2(OH) |
8.BG.15 | Tancoite | LiNa2Al(PO4)(PO3OH)(OH) |
8.BG.20 | Dmisokolovite | K3Cu5AlO2(AsO4)4 |
8.BG.25 | Shchurovskyite | K2CaCu6O2(AsO4)4 |
8.BG.30 | Wrightite | K2Al2O(AsO4)2 |
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 Polyarsite
mindat.org URL:
https://www.mindat.org/min-54025.html
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References for Polyarsite
Localities for Polyarsite
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.
Russia (TL) | |
|
Arsenatnaya fumarole, Second scoria cone, Northern Breakthrough, Great Fissure eruption, Tolbachik Volcanic field, Milkovsky District, Kamchatka Krai, Russia