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Calcioursilite

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About CalcioursiliteHide

Formula:
Ca4(UO2)4(Si2O5)5(OH)6 · 15H2O
Colour:
Lemon yellow
Lustre:
Earthy
Crystal System:
Orthorhombic
Name:
For chemical composition: Uranyl and calcium silicate
Calcioursilite were originally described in 1957 as “ursilite” from the Oktyabr’skoye deposit, Kyzyltyube-Saj, Samgar Steppe, Tajikistan.


Classification of CalcioursiliteHide

Approved, 'Grandfathered' (first described prior to 1959)
9.AK.35

9 : SILICATES (Germanates)
A : Nesosilicates
K : Uranyl neso- and polysilicates

Physical Properties of CalcioursiliteHide

Earthy
Colour:
Lemon yellow

Chemical Properties of CalcioursiliteHide

Formula:
Ca4(UO2)4(Si2O5)5(OH)6 · 15H2O

Crystallography of CalcioursiliteHide

Crystal System:
Orthorhombic
Cell Parameters:
a = 14.09(6) Å, b = 17.87(1) Å, c = 18.24 Å
Ratio:
a:b:c = 0.788 : 1 : 1.021
Unit Cell V:
4,592.62 ų (Calculated from Unit Cell)

Type Occurrence of CalcioursiliteHide

General Appearance of Type Material:
Forms acicular crystals, spherulites and earthy masses.
Geological Setting of Type Material:
Forms in granite-porphyry.

Synonyms of CalcioursiliteHide

Other Language Names for CalcioursiliteHide

Related Minerals - Nickel-Strunz GroupingHide

9.AK.05Soddyite(UO2)2SiO4 · 2H2OOrth.
9.AK.10CuprosklodowskiteCu(UO2)2(SiO3OH]2 · 6H2OTric. 1 : P1
9.AK.10OursiniteCo(UO2)2(SiO3OH)2 · 6H2OOrth. mmm (2/m 2/m 2/m) : Cmca
9.AK.10SklodowskiteMg(UO2)2(SiO3OH)2 · 6H2OMon. 2/m : B2/m
9.AK.15Boltwoodite(K,Na)(UO2)(SiO3OH) · 1.5H2OMon. 2 : P21
9.AK.15KasolitePb(UO2)[SiO4] · H2OMon. 2/m : P21/b
9.AK.15NatroboltwooditeNa(UO2)(SiO3OH) · H2OOrth. mmm (2/m 2/m 2/m)
9.AK.15Uranophane-βCa(UO2)2(SiO3OH)2 · 5H2OMon. 2/m : P21/b
9.AK.15UranophaneCa(UO2)2(SiO3OH)2•5H2OMon. 2 : P21
9.AK.15Beta-UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
9.AK.20Swamboite-(Nd)Nd0.333[(UO2)(SiO3OH)](H2O)∼2.5Mon.
9.AK.25HaiweeiteCa(UO2)2[Si5O12(OH)2] · 6H2OOrth. mmm (2/m 2/m 2/m) : Pbcn
9.AK.25MetahaiweeiteCa(UO2)2Si6O15 · nH2OMon. 2/m : P2/b
9.AK.30WeeksiteK2(UO2)2(Si5O13) · 4H2OOrth.
9.AK.30CoutinhoiteThxBa(1-2x)(UO2)2Si5O13 · (H2O)1+y (0 < x < 0.5 and 0 < y < (2+x))Orth.
9.AK.35MagnioursiliteMg4(UO2)4(Si2O5)5(OH)6 · 20H2O
9.AK.40UranosiliteUO3 · 7SiO2Orth.

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 CalcioursiliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Chernikov, A.A., Krumetskaia, O.V., Sidel'nikova, V.D. (1957): Ursilite - a new silicate of uranium. Atomnaya Energiya Voprosy Geologii Urana, Supplement 6, 61-65.
Chernikov, A.A., Krutetskaya, O.V., Sidelnikova, V.D. (1957): Ursilite - a new silicate of uranium. Atomnaya Energiya Voprosy Geologii Urana, Supplement 6, 73-77 (in Russian).
Chernikov, A.A., Sidorenko, G.A., Valueva, A.A. (1977): New data on uranyl minerals of the ursilite-weeksite group. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 106 (5), 553-564 (in Russian).

Internet Links for CalcioursiliteHide

Localities for CalcioursiliteHide

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.
Tajikistan
 
  • Districts of Republican Subordination
In the collection of Brent Thorne. Acquired from Soenke Stolze.
  • Sughd
    • Khodzhent (Leninabad)
      • Kyzyltyube-Sai
ZVMO (1977) 106, 533; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
 
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