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Arsenudinaite
A valid IMA mineral species
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About Arsenudinaite
Formula:
NaMg4(AsO4)3
Colour:
beige, pale brownish, brownish-yellowish or greyish-brownish
Lustre:
Vitreous
Hardness:
3½
Specific Gravity:
3.816 (Calculated)
Crystal System:
Tetragonal
Name:
Named for being the arsenic analogue of udinaite.
Type Locality:
Isostructural with:
Known synthetic analogue. The As analogue of udinaite. First purely sodium-magnesium anhydrous arsenate mineral. Chemically somewhat related to badalovite, berzeliite, calciojohillerite, magnesiohatertite, and paraberzeliite. Compare also 'Unnamed (Na-Mg Arsenate Hydroxyarsenate)'.
Visually indistinguishable from udinite.
Visually indistinguishable from udinite.
Unique Identifiers
Mindat ID:
53170
Long-form identifier:
mindat:1:1:53170:0
IMA Classification of Arsenudinaite
Classification of Arsenudinaite
8.AC.50
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
C : With medium-sized and large cations
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
C : With medium-sized and large cations
Mineral Symbols
As of 2021 there are now IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Audn | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Arsenudinaite
Vitreous
Transparency:
Transparent
Colour:
Beige, pale brownish, brownish-yellowish or greyish-brownish
Streak:
White
Hardness:
3½ on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
3.816 g/cm3 (Calculated)
Optical Data of Arsenudinaite
Type:
Uniaxial (-)
RI values:
nω = 1.777(10) nε = 1.820(6)
Max. Birefringence:
δ = 0.043
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 ”m thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 ”m thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate
Chemistry of Arsenudinaite
Mindat Formula:
NaMg4(AsO4)3
Element Weights:
Elements listed:
Crystallography of Arsenudinaite
Crystal System:
Tetragonal
Class (H-M):
42m - Scalenohedral
Space Group:
I42d
Cell Parameters:
a = 6.8022(2) Å, c = 19.1843(6) Å
Ratio:
a:c = 1 : 2.82
Unit Cell V:
887.66 Ă
Âł (Calculated from Unit Cell)
Z:
4
Epitaxial Relationships of Arsenudinaite
Epitaxial Minerals:
| 'Anhydrite' | CaSO4 |
| 'Forsterite' | Mg2(SiO4) |
Epitaxy Comments:
Interesting double epitactic intergrowths were observed: âribbedâ parallel aggregates of small, flattened forsterite crystals epitactically overgrow a larger prismatic anhydrite crystal and crystals of udinaite or arsenudinaite epitactically overgrow forsterite
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.657 Ă | (26) |
| 4.300 Ă | (24) |
| 3.341 Ă | (29) |
| 3.007 Ă | (46) |
| 2.775 Ă | (100) |
| 2.750 Ă | (17) |
| 2.663 Ă | (17) |
| 1.698 Ă | (27) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 45a : [Sulfates, arsenates, selenates, antimonates] |
Type Occurrence of Arsenudinaite
General Appearance of Type Material:
Equant tetragonal prismaticâdipyramidal crystals up to 0.15 mm, aggregates up to 1 cm and interrupted crusts up to 2 Ă 2 cm2.
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 5238/1
Geological Setting of Type Material:
The hottest zone of the Arsenatnaya fumarole. The temperatures in this area measured, using a chromelâalumel thermocouple,during collecting were 450â470 âŠC
Associated Minerals at Type Locality:
Synonyms of Arsenudinaite
Other Language Names for Arsenudinaite
Relationship of Arsenudinaite to other Species
Forms a series with:
Common Associates
Associations Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 8.AC. | 'Crocobelonite-1M' | CaFe3+2O(PO4)2 |
| 8.AC. | Magnesioqingheiite | Na2Mg(MgAl)(PO4)3 |
| 8.AC. | Manganobadalovite | NaNaMn(MgFe3+)(AsO4)3 |
| 8.AC. | Changesite-(Y) | (Ca8Y)â»Fe2+(PO4)7 |
| 8.AC. | Babunaite-(Nd) | NdAsO4 |
| 8.AC. | Crocobelonite | CaFe3+2O(PO4)2 |
| 8.AC. | Wopmayite | Ca6Na3â»Mn(PO4)3(PO3OH)4 |
| 8.AC. | Beershevaite | CaFe3+3(PO4)3O |
| 8.AC. | Epiebnerite | (NH4)Zn(PO4) |
| 8.AC. | Ebnerite | (NH4)Zn(PO4) |
| 8.AC.X | Dyrnaesite-(La) | Na8Ce4+(La,REE)2(PO4)6 |
| 8.AC. | Edtollite | K2NaCu5Fe3+O2(AsO4)4 |
| 8.AC. | Angarfite | NaFe3+5(PO4)4(OH)4 · 4H2O |
| 8.AC. | Kabalovite | Fe2+3Fe3+4(PO4)6 |
| 8.AC. | Nazarchukite | Ca2NiFe3+2(PO4)4 |
| 8.AC. | Calciohatertite | NaNaCa(CaFe3+)(AsO4)3 |
| 8.AC. | Alumoedtollite | K2NaCu5AlO2(AsO4)4 |
| 8.AC.02 | Grigorievite | Cu3Fe3+2Al2(VO4)6 |
| 8.AC.02 | Koksharovite | CaMg2Fe3+4(VO4)6 |
| 8.AC.02 | Ziminaite | Fe3+ 6 (VO4)6 |
| 8.AC.05 | Hatertite | Na2(Ca,Na)(Fe3+,Cu)2(AsO4)3 |
| 8.AC.05 | Erikapohlite | Cu3(Zn,Cu,Mg)4Ca2(AsO4)6 · 2H2O |
| 8.AC.05 | 'Unnamed (Na-Mg Arsenate Hydroxyarsenate)' | NaMg3(AsO4)(AsO3OH)2 |
| 8.AC.05 | 'Unnamed (Na-Zn-H Arsenate Hydroxyarsenate)' | Na(Na0.6Zn0.4)Zn2(H0.6AsO4)(AsO3OH)2 |
| 8.AC.05 | Calciojohillerite | NaCaMg3(AsO4)3 |
| 8.AC.05 | Magnesiohatertite | (Na,Ca)2Ca(Mg,Fe3+)2(AsO4)3 |
| 8.AC.05 va | 'Alluaudite-Na[]' | â»4Na4Mn2+4Fe3+8(PO4)12 |
| 8.AC.05 va | 'Alluaudite-Ca[]' | â»4Ca4Mn2+4Fe3+8(PO4)12 |
| 8.AC.05 va | 'Ferroalluaudite-NaNa' | Na4Na4Fe2+4Fe3+8(PO4)12 |
| 8.AC.05 | 'Hagendorfite-NaNa' | NaNaFe2+(Mn2+,Mn3+)(PO4)3 (?) |
| 8.AC.05 | O'Danielite | Na(Zn,Mg)3(AsO4)(AsO3OH)2 |
| 8.AC.05 | Howardevansite | NaCuFe2(VO4)3 |
| 8.AC.05 | Khrenovite | Na3Fe3+2(AsO4)3 |
| 8.AC.05 | Zincobradaczekite | NaZn2Cu2(AsO4)3 |
| 8.AC.05 | Paraberzeliite | NaCa2Mg2(AsO4)3 |
| 8.AC.05 | Badalovite | Na2Mg2Fe(AsO4)3 |
| 8.AC.05 | Magnesiocanutite | NaMnMg2[AsO4]2[AsO2(OH)2] |
| 8.AC.05 | Manganohatertite | NaNaCa(MnFe3+)(AsO4)3 |
| 8.AC.05 | Camanchacaite | NaCaMg2[AsO4][AsO3(OH)]2 |
| 8.AC.07 | Zhanghuifenite | Na3Mn4Mg2Al(PO4)6 |
| 8.AC.07 | Ferrobobfergusonite | Na2Fe2+5Fe3+Al(PO4)6 |
| 8.AC.10 | Hagendorfite | NaCaMn2+Fe2+2(PO4)3 |
| 8.AC.10 | 'Ferrohagendorfite' | NaCaFe2+Fe2+2(PO4)3 |
| 8.AC.10 | Johillerite | Na(Mg,Zn)3Cu(AsO4)3 |
| 8.AC.10 | Varulite | NaCaMn2+Mn2+2(PO4)3 |
| 8.AC.10 | Nickenichite | Na0.8Ca0.4Cu0.4(Mg,Fe)3(AsO4)3 |
| 8.AC.10 | Arseniopleite | NaCaMnMn2(AsO4)3 |
| 8.AC.10 | Groatite | NaCaMn2(PO4)[PO3(OH)]2 |
| 8.AC.10 | Alluaudite | (Na,Ca)Mn2+(Fe3+,Mn2+,Fe2+,Mg)2(PO4)3 |
| 8.AC.10 | Bradaczekite | NaCu4(AsO4)3 |
| 8.AC.10 | Caryinite | (Na,Pb)(Ca,Na)CaMn2+2(AsO4)3 |
| 8.AC.10 | Ferroalluaudite | (Na,Ca)Fe2+(Fe3+,Mn2+,Fe2+)2(PO4)3 |
| 8.AC.10 | Maghagendorfite | (Na,â»)MgMn2+(Fe2+,Fe3+)2(PO4)3 |
| 8.AC.15 | Ferrowyllieite | (Na,Ca,Mn)(Fe,Mn)(Fe,Fe,Mg)Al(PO4)3 |
| 8.AC.15 | Qingheiite | NaNaMn2+(MgAl)(PO4)3 |
| 8.AC.15 | Rosemaryite | (Na,Ca,Mn)(Mn,Fe2+)(Fe3+,Mg)Al(PO4)3 |
| 8.AC.15 | Ferroqingheiite | NaNaFe2+(MgAl)(PO4)3 |
| 8.AC.15 | Ferrorosemaryite | â»NaFe2+Fe3+Al(PO4)3 |
| 8.AC.15 | Bobfergusonite | Na2Mn5FeAl(PO4)6 |
| 8.AC.15 | Wyllieite | (Na,Ca,Mn)(Mn,Fe)(Fe,Mg)Al(PO4)3 |
| 8.AC.17 | Czochralskiite | Na4Ca3Mg(PO4)4 |
| 8.AC.18 | Manitobaite | Na16Mn2+ 25Al8(PO4)30 |
| 8.AC.20 | MariÄite | NaFe2+(PO4) |
| 8.AC.25 | SchÀferite | (NaCa2)Mg2(VO4)3 |
| 8.AC.25 |
Arsenatnaya fumarole, Second scoria cone, Northern Breakthrough, Great Fissure eruption, Tolbachik Volcanic field, Milkovsky District, Kamchatka Krai, Russia