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Alarsite

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About AlarsiteHide

Formula:
AlAsO4
Colour:
Colorless, with pale tints of yellow, green, blue due to inclusions
Lustre:
Vitreous
Hardness:
5 - 5½
Specific Gravity:
3.32 (Calculated)
Crystal System:
Trigonal
Name:
Named by Tatyana Fedorovna Semenova, Lidiya Pavlovna Vergasova, Stanislav Konstantinovich Filatov, and Vasiliy Viktorovich Ananev in 1994 from its composition, containing ALuminium and ARSenic.
This page provides mineralogical data about Alarsite.


Classification of AlarsiteHide

Approved
Approval Year:
1993
8.AA.05

8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
A : With small cations (some also with larger ones)

Physical Properties of AlarsiteHide

Vitreous
Transparency:
Transparent, Translucent
Colour:
Colorless, with pale tints of yellow, green, blue due to inclusions
Comment:
colorless in transmitted light
Streak:
White
Hardness:
5 - 5½ on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Density:
3.32 g/cm3 (Calculated)

Optical Data of AlarsiteHide

Type:
Uniaxial (+)
RI values:
nω = 1.596 nε = 1.608
Birefringence:
0.012
Max Birefringence:
δ = 0.012
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Optical Extinction:
Parallel.
Pleochroism:
Non-pleochroic

Chemical Properties of AlarsiteHide

Formula:
AlAsO4
IMA Formula:
Al(AsO4)

Crystallography of AlarsiteHide

Crystal System:
Trigonal
Class (H-M):
3 2 - Trapezohedral
Space Group:
P31 2 1
Morphology:
Subhedral grains, to 0.3 mm, in aggregates.
Comment:
Possibly P3221

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
4.36 (20)
4.06 (31)
3.442 (100)
2.514 (80)
2.359 (15)
1.873 (16)
1.4202 (11)

Type Occurrence of AlarsiteHide

Place of Conservation of Type Material:
Mining Institute, St. Petersburg, Russia.
Geological Setting of Type Material:
Fumarolic exhalations
Associated Minerals at Type Locality:

Synonyms of AlarsiteHide

Other Language Names for AlarsiteHide

German:Alarsit
Spanish:Alarsita

Related Minerals - Nickel-Strunz GroupingHide

8.AA.05BerliniteAlPO4Trig. 3 2 : P31 2 1
8.AA.05RodolicoiteFe3+PO4Trig. 3 2 : P31 2 1
8.AA.10BerylloniteNaBePO4Mon. 2/m : P21/b
8.AA.15HurlbutiteCaBe2(PO4)2Mon.
8.AA.20LithiophosphateLi3PO4Orth. mm2 : Pmn21
8.AA.25NalipoiteNaLi2PO4Orth.
8.AA.30OlympiteNa5Li(PO4)2Orth.

Fluorescence of AlarsiteHide

Not fluorescent

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 AlarsiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Machatschki, F. (1936) Die Kristallstruktur von Tiefquarz SiO2 und Aluminiumorthoarsenat AlAsO4. Zeitschrift für Kristallographie: 94: 222-230.
Goiffon, A., Bayle, G., Astier, R., Jumas, J.C., Maurin, M., and Phillippot, E. (1983) Cristallochimie des phases GaPO4, AlAsO4 et GaAsO4. Étude comprée des structures de type quartz α. Revue de Chimie Minérale: 20: 338-350.
Semenova, T.F., Vergasova, L.P., Filatov, S.K., and Ananev, V.V. (1994) Alarsite AlAsO4: A new mineral from volcanic exhalations. Doklady Akademii Nauk: 338(4): 501-505.

Internet Links for AlarsiteHide

Localities for AlarsiteHide

ⓘ - 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
[DAN,(1994) 338, n4, 501-505; MinRec 27:201]; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
        • Northern Breakthrough (North Breach)
          • Second scoria cone
Pekov, I.V., Zubkova, N.V., Yapaskurt, V.O., Belakovskiy, D.I., Vigasina, M.F., Sidorov, E.G., Pushcharovsky, D.Yu. (2014): New arsenate minerals from the Arsenatnaya fumarole, Tolbachik volcano, Kamchatka, Russia. II. Ericlaxmanite and kozyrevskite, two natural modifications of Cu4O(AsO4)2. Mineralogical Magazine, 78, 1553–1569.
Mineral and/or Locality  
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