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Ashcroftine-(Ce)

Valid as an unnamed mineral
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Formula:
K5Na5(Ce,Ca)12Si28O70(OH)2(CO3)8 · 8H2O
Lustre:
Vitreous
Crystal System:
Tetragonal
Possibly the Ce-analogue of ashcroftine-(Y).


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Unique IdentifiersHide

Mindat ID:
6809
Long-form identifier:
mindat:1:1:6809:9

Similar NamesHide

Ashcroftine-(Y)A valid IMA mineral species - grandfatheredK5Na5(Y,Ca)12Si28O70(OH)2(CO3)8 · 8H2O

IMA Classification of Ashcroftine-(Ce)Hide

IMA status notes:
Unnamed (probably valid)
Approval history:
Unnamed, but probably valid.

Classification of Ashcroftine-(Ce)Hide

Strunz-mindat (2026):
9.DN.15

9 : SILICATES (Germanates)
D : Inosilicates
N : Inosilicates with 6-periodic double chains

Physical Properties of Ashcroftine-(Ce)Hide

Lustre:
Vitreous

Optical Data of Ashcroftine-(Ce)Hide

Type:
Uniaxial (+)
RI values:
nω = 1.536 nε = 1.545
Max. Birefringence:
δ = 0.009
Based on recorded range of RI values above.

Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.

Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.

Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.

Surface Relief:
Moderate

Chemistry of Ashcroftine-(Ce)Hide

Mindat Formula:
K5Na5(Ce,Ca)12Si28O70(OH)2(CO3)8 · 8H2O
Element Weights:
Element% weight
Ce36.902 %
O36.519 %
Si17.259 %
K4.291 %
Na2.523 %
C2.109 %
H0.398 %

Calculated from ideal end-member formula.
Elements listed:
C, Ca, Ce, H, K, Na, O, Si - search for minerals with similar chemistry

Crystallography of Ashcroftine-(Ce)Hide

Crystal System:
Tetragonal

Related Minerals - Strunz-mindat GroupingHide

9.DN.Letnikovite-(Ce)(Na◻)Ca2Ce2[Si7O17(OH)]F4(H2O)4Mon. 2/m : B2/m
9.DN.05ZektzeriteLiNaZrSi6O15Orth. mmm (2/m 2/m 2/m) : Cmca
9.DN.05EmeleusiteLi2Na4Fe2Si12O30Orth. mmm (2/m 2/m 2/m)
9.DN.05TuhualiteNaFe2+Fe3+Si6O15Orth. mmm (2/m 2/m 2/m) : Cmca
9.DN.10Semenovite-(Ce)Na8Ca2FeBe6Ce2Si14O40(OH)4F4Orth. mmm (2/m 2/m 2/m)
9.DN.15Ashcroftine-(Y)K5Na5(Y,Ca)12Si28O70(OH)2(CO3)8 · 8H2OTet. 4/mmm (4/m 2/m 2/m) : I4/mmm

RadioactivityHide

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.

Internet Links for Ashcroftine-(Ce)Hide

References for Ashcroftine-(Ce)Hide

Reference List:
Quick NavTopUnique IdentifiersSimilar NamesIMA Classification Classification Physical Properties Optical Data Chemistry Crystallography Strunz-MindatRadioactivityOther InformationInternet Links References
 
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