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Calcinaksite

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About CalcinaksiteHide

Formula:
KNaCa(Si4O10)·H2O
Colour:
Colorless to light gray
Hardness:
5
Specific Gravity:
2.62
Crystal System:
Triclinic
Name:
Calcinaksite is named for the chemical composition and by analogy to the related minerals manaksite and fenaksite.
This page provides mineralogical data about Calcinaksite.


Classification of CalcinaksiteHide

Approved
Approval Year:
2013

Physical Properties of CalcinaksiteHide

Colour:
Colorless to light gray
Hardness:
Tenacity:
Brittle
Cleavage:
Perfect
perfect on {001} and less perfect on {010}
Density:
2.62(2) g/cm3 (Measured)    2.623 g/cm3 (Calculated)

Optical Data of CalcinaksiteHide

Type:
Biaxial (+)
RI values:
nα = 1.542(2) nβ = 1.550(2) nγ = 1.565(3)
2V:
Measured: 75° (10)
Max Birefringence:
δ = 0.023
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
medium, r<v.

Chemical Properties of CalcinaksiteHide

Formula:
KNaCa(Si4O10)·H2O
IMA Formula:
KNaCa(Si4O10) · H2O

Crystallography of CalcinaksiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Setting:
P1
Cell Parameters:
a = 7.021(2) Å, b = 8.250(3) Å, c = 10.145(2) Å
α = 102.23(2)°, β = 100.34(2)°, γ = 115.09(3)°
Ratio:
a:b:c = 0.851 : 1 : 1.23
Unit Cell V:
495.44 ų (Calculated from Unit Cell)
Z:
2
Comment:
P1¯

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.300(67)
3.173(95)
3.060(100)
2.851(83)
2.664(62)
2.493(52)
1.749(45)
Comments:
From Type Description.

Type Occurrence of CalcinaksiteHide

General Appearance of Type Material:
Clusters of colourless to light-grey subhedral prismatic crystals
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 4419/1
Geological Setting of Type Material:
A xenolith of metamorphosed carbonate-rich rock in an alkaline magma
Associated Minerals at Type Locality:

Synonyms of CalcinaksiteHide

Relationship of Calcinaksite to other SpeciesHide

Other Members of this group:
Fenaksite(K,Na)4(Fe,Mn)2(Si4O10)2(OH,F)Tric.
LitidioniteCuNaKSi4O10Tric.
ManaksiteKNaMnSi4O10Tric.

Fluorescence of CalcinaksiteHide

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 CalcinaksiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Chukanov, N.V., Aksenov, S.M., Rastsvetaeva, R.K., Blass, G., Varlamov, D.A., Pekov, I.V., Belakovskiy, D.I. and Gurzhiy, V.V. (2013) Calcinaksite, IMA 2013-081. CNMNC Newsletter No. 18, December 2013, page 3254; Mineralogical Magazine, 77, 3249-3258.
S. M. Aksenov, R. K. Rastsvetaeva, N. V. Chukanov and U. Kolitsch (2014): Structure of calcinaksite KNa[Ca(H2O)][Si4O10], the first hydrous member of the litidionite group of silicates with [Si8O20]8- tubes. Acta Crystallogr. B70, 768-775.

Internet Links for CalcinaksiteHide

Localities for CalcinaksiteHide

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.
Germany (TL)
 
  • Rhineland-Palatinate
    • Mayen
      • Ettringen
Chukanov, N.V., Aksenov, S.M., Rastsvetaeva, R.K., Blass, G., Varlamov, D.A., Pekov, I.V., Belakovskiy, D.I. and Gurzhiy, V.V. (2013) Calcinaksite, IMA 2013-081. CNMNC Newsletter No. 18, December 2013, page 3254; Mineralogical Magazine, 77, 3249-3258; S. M. Aksenov, R. K. Rastsvetaeva, N. V. Chukanov and U. Kolitsch (2014): Structure of calcinaksite KNa[Ca(H2O)][Si4O10], the first hydrous member of the litidionite group of silicates with [Si8O20]8- tubes. Acta Crystallogr. B70, 768-775.
Mineral and/or Locality  
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