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Thallian Voltaite

A variety of Voltaite
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Formula:
(K,Tl)2Fe2+5Fe3+3Al(SO4)12 · 18H2O
the studied material (Fornovolasco) simplified formula is (K,Tl)2(Fe2+,Mg,Mn)5Fe3+3Al(SO4)12·18H2O
Crystal System:
Isometric
Two varieties are recognized (Biagioni et al., 2020):

(1) (K1.94Tl0.28)Σ2.22(Fe2+3.57Mg0.94Mn0.55)Σ5.06Fe3+3.06Al0.98S11.92O48·18H2O;

(2) (K2.04Tl0.32)Σ2.36(Fe2+3.83Mg0.91Mn0.29)Σ5.03Fe3+3.05Al0.97S11.92O48·18H2O


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Unique IdentifiersHide

Mindat ID:
54930 (as Thallian Voltaite)
4203 (as Voltaite)
Long-form identifier:
mindat:1:1:54930:1 (as Thallian Voltaite)
mindat:1:1:4203:7 (as Voltaite)

Chemistry of Thallian VoltaiteHide

Mindat Formula:
(K,Tl)2Fe2+5Fe3+3Al(SO4)12 · 18H2O

the studied material (Fornovolasco) simplified formula is (K,Tl)2(Fe2+,Mg,Mn)5Fe3+3Al(SO4)12·18H2O
Element Weights:
Element% weight
O52.044 %
Fe22.019 %
S18.964 %
K3.854 %
H1.788 %
Al1.330 %

Calculated from ideal end-member formula.
Elements listed:
Al, Fe, H, K, O, S, Tl - search for minerals with similar chemistry

Crystallography of Thallian VoltaiteHide

Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Fd3c
Setting:
Fd3c
Cell Parameters:
a = 27.2635 Å
Unit Cell V:
20265 ų

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 Thallian VoltaiteHide

References for Thallian VoltaiteHide

Localities for Thallian VoltaiteHide

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 references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Italy
 
  • Tuscany
    • Lucca Province
      • Fabbriche di Vergemoli
Biagioni et al. (2020)
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