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Knoxvillite

A variety of Magnesiocopiapite
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Formula:
MgFe3+4(SO4)6(OH)2 · 20H2O
A chromiferous iron sulphate, not IMA-approved. May be a mixture of magnesiocopiapite and redingtonite, or could be a chromiferous variety of magnesiocopiapite.

Originally reported from Redington Mine, Knoxville, Napa Co., California, USA.

Identity of knoxvillite as magnesiocopiapite stated in Centennial Edition, Mineralogy of California.


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Unique IdentifiersHide

Mindat ID:
9302 (as Knoxvillite)
2486 (as Magnesiocopiapite)
Long-form identifier:
mindat:1:1:9302:2 (as Knoxvillite)
mindat:1:1:2486:6 (as Magnesiocopiapite)

Chemistry of KnoxvilliteHide

Mindat Formula:
MgFe3+4(SO4)6(OH)2 · 20H2O
Element Weights:
Element% weight
O60.406 %
Fe18.334 %
S15.791 %
H3.475 %
Mg1.995 %

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

Other Language Names for KnoxvilliteHide

German:Knoxvillit
Spanish:Knoxvillita

Common AssociatesHide

Associations Based on Photo Data:
2 photos of Knoxvillite associated with RedingtoniteFe2+Cr3+2(SO4)4 · 22H2O
2 photos of Knoxvillite associated with BotryogenMgFe3+(SO4)2(OH) · 7H2O

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 KnoxvilliteHide

References for KnoxvilliteHide

Localities for KnoxvilliteHide

Showing 1 localities.

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.
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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.
USA
 
  • California
    • Napa County
      • Knoxville Mining District
        • Knoxville
Palache et al. (1951)
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