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Eguëite

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Formula:
CaFe14(PO4)10(OH)14 · 21H2O
Colour:
Brownish yellow, yellow
Lustre:
Vitreous
Specific Gravity:
2.6
Name:
After the locality at Koukourdei (Bir Salado) near Hangara, Egai (Eguéï Region), Chad.
An ill-defined substance.


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Name EncodingHide

ASCII-7:
Egueite

Unique IdentifiersHide

Mindat ID:
32417
Long-form identifier:
mindat:1:1:32417:3

Physical Properties of EguëiteHide

Lustre:
Vitreous
Comment:
Lustre also slightly greasy
Colour:
Brownish yellow, yellow
Tenacity:
Fragile
Density:
2.6 g/cm3 (Measured)    

Optical Data of EguëiteHide

Type:
Isotropic

Chemistry of EguëiteHide

Mindat Formula:
CaFe14(PO4)10(OH)14 · 21H2O
Element Weights:
Element% weight
O50.248 %
Fe32.739 %
P12.970 %
H2.364 %
Ca1.678 %

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

Crystallography of EguëiteHide

Morphology:
Occurs as small nodules with a fibrous-lamellar structure and exhibiting small monoclinic (?) crystals in cavities.

Synonyms of EguëiteHide

Other InformationHide

Notes:
Soluble in cold HCl.
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 EguëiteHide

References for EguëiteHide

Localities for EguëiteHide

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.
Chad
 
  • Kanem Region
    • Eguei
Palache et al. (1951)
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