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Katiarsite

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About KatiarsiteHide

Formula:
KTiO(AsO4)
Colour:
Colorless
Lustre:
Vitreous
Specific Gravity:
3.49 (Calculated)
Crystal System:
Orthorhombic
Name:
Name of the mineral reflects its chemical composition, kalium titanyl arsenate.
Known synthetic analogue (an important linear non-linear optical material). Unique combination of elements. One of a few Ti-As approved minerals, the group also including asbecasite, braithwaiteite, cafarsite, graeserite, hemloite and tomichite; the only Ti-As mineral from the volcanic fumarole environment.

Compare yurgensonite, its Sn-Ti-ordered analogue.


Classification of KatiarsiteHide

Approved
Approval Year:
2014

Physical Properties of KatiarsiteHide

Vitreous
Transparency:
Transparent
Colour:
Colorless
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
3.49 g/cm3 (Calculated)

Optical Data of KatiarsiteHide

Type:
Biaxial (+)
RI values:
nα = 1.784(3) nβ = 1.792(3) nγ = 1.870(5)
Max Birefringence:
δ = 0.086
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Comments:
2V is small

Chemical Properties of KatiarsiteHide

Formula:
KTiO(AsO4)
Common Impurities:
Fe(III)

Crystallography of KatiarsiteHide

Crystal System:
Orthorhombic
Class (H-M):
mm2 - Pyramidal
Space Group:
Pna21
Setting:
Pna21
Cell Parameters:
a = 13.174(4) Å, b = 6.5635(10) Å, c = 10.805(2) Å
Ratio:
a:b:c = 2.007 : 1 : 1.646
Unit Cell V:
934.28 ų (Calculated from Unit Cell)
Z:
8
Morphology:
Long prismatic to acicular, typically sword-like crystals up to 3 x 10 x 50 um, rarely up to 0.15 mm long. Crystal forms are: {011}, {201}, {100} and {001}.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.91Å(17)
5.62Å(74)
4.18Å(19)
3.633Å(15)
3.157Å(66)
2.826Å(100)
2.809Å(96)
2.704Å(19)
Comments:
From Type Description.

Type Occurrence of KatiarsiteHide

General Appearance of Type Material:
Long prismatic to acicular, typically sword-like crystals up to 3 x 10 x 50 um, rarely up to 0.15 mm long; crystal forms observed: {011}, {201}, {100}, {001}
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 4540/1
Geological Setting of Type Material:
Volcanic fumaroles
Associated Minerals at Type Locality:

Synonyms of KatiarsiteHide

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 KatiarsiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Pekov, I.V., Yapaskurt, V.O., Britvin, S.N., Zubkova, N.V., Vigasina, M.F. and Sidorov, E.G. (2014) Katiarsite, IMA 2014- 025. CNMNC Newsletter No. 21, August 2014, page 800; Mineralogical Magazine, 78, 797-804.
Pekov, I.V., Yapaskurt, V.O., Britvin, S.N., Zubkova, N.V., Vigasina, M.F., Sidorov, E.G. (2016): New arsenate minerals from the Arsenatnaya fumarole, Tolbachik volcano, Kamchatka, Russia. V. Katiarsite, KTiO(AsO4). Mineralogical Magazine. 80: 639-646

Internet Links for KatiarsiteHide

Localities for KatiarsiteHide

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., Yapaskurt, V.O., Britvin, S.N., Zubkova, N.V., Vigasina, M.F. and Sidorov, E.G. (2014) Katiarsite, IMA 2014- 025. CNMNC Newsletter No. 21, August 2014, page 800; Mineralogical Magazine, 78, 797-804. ; Pekov, I.V., Yapaskurt, V.O., Britvin, S.N., Zubkova, N.V., Vigasina, M.F., Sidorov, E.G. (2016): New arsenate minerals from the Arsenatnaya fumarole, Tolbachik volcano, Kamchatka, Russia. V. Katiarsite, KTiO(AsO4). Mineralogical Magazine, 80, 639-646
 
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