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About ArsmiranditeHide

dark greyish green to olive-greenish black
Specific Gravity:
3.715 (Calculated)
Crystal System:
for Latin mirandus, marvellous, to reflect the unusual crystal structure that, moreover, is As-rich
New structure type. Co-described with lehmannite from which it is visually indistinguishable.

The two have similar, unique structural features:

- Fe3+ (or Ti4+, in lehmannite) in cubic coordination;
- packing of unusual, nanoscale (~1.5 nm across) clusters, of the {[MCu12O8](AsO4)8} composition; M = Fe3+ in arsmirandite

Na and halogen atoms are between the nanoclusters.

Associates also include various arseantes and sulfates.

Classification of ArsmiranditeHide

Approved, Pending publication
Approval Year:

B : Phosphates, etc., with additional anions, without H2O
0 :

Physical Properties of ArsmiranditeHide

dark greyish green to olive-greenish black
3.715 g/cm3 (Calculated)

Chemical Properties of ArsmiranditeHide

Emperical Formula (of original material):

Crystallography of ArsmiranditeHide

Crystal System:
Class (H-M):
2/m - Prismatic
Space Group:
Cell Parameters:
a = 10.742(2) Å, b = 21.019(3) Å, c = 11.787(2) Å
β = 117.06(3)°
a:b:c = 0.511 : 1 : 0.561
Unit Cell V:
2370 ų

X-Ray Powder DiffractionHide

Powder Diffraction Data:
10.58 Å(79)
8.74 Å(100)
5.381 Å(46)
5.288 Å(80)
3.770 Å(33)
2.693 Å(28)
2.643 Å(30)
2.574 Å(74)
From Type Description.

Type Occurrence of ArsmiranditeHide

General Appearance of Type Material:
equant crystals, up to 20 × 20 × 30 sq. μm, usually intergrown to form thin crusts, up to 2 × 3 cm in area
Place of Conservation of Type Material:
Type material is deposited in the collections of the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia, registration number 4613/1
Geological Setting of Type Material:
volcanic fumarole
Associated Minerals at Type Locality:

Synonyms of ArsmiranditeHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Arsmirandite associated with JohilleriteNa(Mg,Zn)3Cu(AsO4)3

Related Minerals - Nickel-Strunz GroupingHide

8.B0.AbuiteCaAl2(PO4)2F2Orth. 2 2 2 : P21 21 21
8.B0.20JoëlbruggeritePb3Zn3(Sb5+,Te6+)As2O13(OH,O)Trig. 3 2 : P3 2 1

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for ArsmiranditeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Pekov, I.V., Britvin, S.N., Yapaskurt, V.O., Polekhovsky, Y.S., Krivovichev, S.V., Vigasina, M.F. and Sidorov, E.G. (2015) Arsmirandite, IMA 2014-081. CNMNC Newsletter No. 23, February 2015, page 57; Mineralogical Magazine, 79, 51-58.
Britvin, S. N., Pekov, I. V., Yapaskurt, V. O., Koshlyakova, N. N., Göttlicher, J., Krivovichev, S. V., ... & Sidorov, E. G. (2020). Polyoxometalate chemistry at volcanoes: discovery of a novel class of polyoxocuprate nanoclusters in fumarolic minerals. Scientific Reports, 10(1), 1-7.
Pekov, I.V., Britvin, S.N., Yapaskurt, V.O., Koshlyakova, N.N., Polekhovsky, Yu.S., Göttlicher, J., Chukanov, N.V., Vigasina, M.F., Krivovichev, S.V., Turhkova, A.G., Sidorov, E.G. (2020): Arsmirandite, Na18Cu12Fe3+O8(AsO4)8Cl5, and lehmannite, Na18Cu12TiO8(AsO4)8FCl5, new minerals from fumerole exhalations of the Tolbachik Volcano, Kamchatka, Russia. Zapiski RMO: 149: 1-17

Internet Links for ArsmiranditeHide

Localities for ArsmiranditeHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Russia (TL)
  • Kamchatka Krai
    • Tolbachik volcano
      • Great Fissure eruption (Main Fracture)
        • Northern Breakthrough (North Breach)
          • Second scoria cone
Pekov, I.V., Britvin, S.N., Yapaskurt, V.O., Polekhovsky, Y.S., Krivovichev, S.V., Vigasina, M.F. and Sidorov, E.G. (2015) Arsmirandite, IMA 2014-081. CNMNC Newsletter No. 23, February 2015, page 57; Mineralogical Magazine, 79, 51-58. ; Shchipalkina, N.V.; Pekov, I.V.; Britvin, S.N.; Koshlyakova, N.N.; Vigasina, M.F.; Sidorov, E.G. (2019) A New Mineral Ferrisanidine, K[Fe3+Si3O8], the First Natural Feldspar with Species-Defining Iron. Minerals 9, 770.
矿物 and/or 产地  
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