childrenite
crystallized childrenite from Itingoa in Minas Gerais in Brazil
Detailed sheet
childrenite
Discovered in 1823, its name honors the English mineralogist John George Children (1777-1852). It is very close to the eosphorite and in its chemical composition iron is the dominant on manganese, unlike eosphorite where manganese is dominating.
CHEMICAL CHARACTERISTICS
(Fe,Mn)Al[PO4](OH)2] H2O
hydrated iron aluminium phosphate
PHYSICAL CHARACTERISTICS
Main color
orange
Other colors
brown
Color of streak
white
Luster
resinous, vitreous
Hardness
5.0 to 0.0
Density
3.10 to 3.20
Cleavage
indistinct
OPTICAL PROPERTIES
Transparency
translucent, transparent
Refractive index
1.630 - 1.685
Double refraction
0.030
definite, biaxial (-)
visible double refraction
Yes
Dispersion
+
Pleochroism
definite
Number of colors
3
yellow, pink, colorless
Fluorescence
none
CRYSTALS PROPERTIES
dipyramidal
crystals system
orthorhombic
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is found in France in the of Salsigne in the Aude, at Echassières in Allier, in Brazil (Minas Gerais and Rio Grande do Norte), Australia, Canada (Yukon), Bolivia (Carinthia), the Chile (Potosi), England (Conouailles, Devon), Kosovo, Portugal, Spain, United States (south Dakota, North Carolina, Maine, new Hampshire).
use in jewelry
it is faceted and it’s a collection stone
Other
Gems
Venez visitez
notre site web
voillot-joaillier.fr
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