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Cesiodymite

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About CesiodymiteHide

Formula:
CsKCu5O(SO4)5
Colour:
Light green to green
Lustre:
Vitreous
Specific Gravity:
3.59 (Calculated)
Crystal System:
Triclinic
Name:
Named from cesium and Greek δίδυµος, a twin brother, being a Cs-K-ordered analogue of cryptochalcite.
Isostructural with:
The Cs (or CsK-) analogue of cryptochalcite. The mineral is doubly-unique being the first Cs sulphate mineral and also the first one to combine Cs and Cu as species-defining elements. It is also the sixth Cs mineral of the oxysalts group (discluding silicate minerals) after caesiumpharmacosiderite (arsenate), londonite, ramanite-(Cs) (borates), margaritasite (vanadate), and mccrillisite (phosphate).

Compare 'Unnamed (Cesium Potassium Sulfate)'.

Visually indistinguishable from cryptochalcite.


Classification of CesiodymiteHide

Approved
Approval Year:
2016
First Published:
2018

Physical Properties of CesiodymiteHide

Vitreous
Transparency:
Transparent
Colour:
Light green to green
Tenacity:
Brittle
Density:
3.59 g/cm3 (Calculated)

Optical Data of CesiodymiteHide

Type:
Biaxial (-)
RI values:
nα = 1.610(1) nβ = 1.627(4) nγ = 1.635(4)
2V:
Measured: 70° (10)
Max Birefringence:
δ = 0.025
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of CesiodymiteHide

Formula:
CsKCu5O(SO4)5

Crystallography of CesiodymiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 10.0682(4) Å, b = 12.7860(7) Å, c = 14.5486(8) Å
α = 102.038(5)°, β = 100.847(4)°, γ = 89.956(4)°
Ratio:
a:b:c = 0.787 : 1 : 1.138
Unit Cell V:
1,797.51 ų (Calculated from Unit Cell)
Morphology:
Coarse tabular or prismatic crystals; grains up to 0.3 mm

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
6.95(54)
3.946(100)
3.765(37)
3.404(39)
3.188(50)
3.149(27)
3.104(28)
2.681(31)

Occurrences of CesiodymiteHide

Paragenetic Mode(s):
•  Fumarolic

Type Occurrence of CesiodymiteHide

General Appearance of Type Material:
Coarse tabular or prismatic crystals or grains up to 0.3 mm
Place of Conservation of Type Material:
Collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia (registration number 4842/1)
Empirical Formula of Type Material:
(K1.14Rb0.16Cs0.732.03(Cu3.69Zn1.335.02S4.99O21
Geological Setting of Type Material:
Fumarole
Associated Minerals at Type Locality:
Reference:
Pekov, I.V., Zubkova, N.V., Agakhanov, A.A., Pushcharovsky, D.Yu., Yapaskurt, V.O., Belakovskiy, D.I., Vigasina, M.F., Sidorov, E.G., Britvin, S.N. (2018): Cryptochalcite, K2Cu5O(SO4)5, and cesiodymite, CsKCu5O(SO4)5, two new isotypic minerals and the K-Cs isomorphism in this solid-solution series. European Journal of Mineralogy, 30: 593-607

Synonyms of CesiodymiteHide

Other Language Names for CesiodymiteHide

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 CesiodymiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Pekov, I.V., Zubkova, N.V., Agakhanov, A.A., Yapaskurt, V.O., Belakovskiy, D.I., Vigasina, M.F., Britvin, S.N., Sidorov, E.G., Pushcharovsky, D.Y. (2016): Cesiodymite, IMA 2016-002. CNMNC Newsletter No. 31, June 2016, page 694; Mineralogical Magazine: 80: 691–697.
Pekov, I.V., Zubkova, N.V., Agakhanov, A.A., Pushcharovsky, D.Yu., Yapaskurt, V.O., Belakovskiy, D.I., Vigasina, M.F., Sidorov, E.G., Britvin, S.N. (2018): Cryptochalcite, K2Cu5O(SO4)5, and cesiodymite, CsKCu5O(SO4)5, two new isotypic minerals and the K-Cs isomorphism in this solid-solution series. European Journal of Mineralogy, 30: 593-607.

Internet Links for CesiodymiteHide

Localities for CesiodymiteHide

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., Zubkova, N.V., Agakhanov, A.A., Yapaskurt, V.O., Belakovskiy, D.I., Vigasina, M.F., Britvin, S.N., Sidorov, E.G., Pushcharovsky, D.Y. (2016): Cesiodymite, IMA 2016-002. CNMNC Newsletter No. 31, June 2016, page 694; Mineralogical Magazine: 80: 691–697; Pekov, I.V., Zubkova, N.V., Agakhanov, A.A., Pushcharovsky, D.Yu., Yapaskurt, V.O., Belakovskiy, D.I., Vigasina, M.F., Sidorov, E.G., Britvin, S.N. (2018): Cryptochalcite, K2Cu5O(SO4)5, and cesiodymite, CsKCu5O(SO4)5, two new isotypic minerals and the K-Cs isomorphism in this solid-solution series. European Journal of Mineralogy, 30: 593-607
Mineral and/or Locality  
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