Joaquinite-(Ce)
Ba₂NaCe₂Fe²⁺(Ti,Nb)₂Si₈O₂₆(OH,F) · H₂O

     Joaquinite-(Ce) is extremely rare at MSH. Only a few specimens are known to exist. Modris Baum just received confirmation from the Royal Ontario Museum that this specimen is joaquinite-(Ce) (July '07)

PHYSICAL CHARACTERISTICS:

Color is usually yellow to pale orange.
Luster is vitreous.
Diaphaneity is transparent.
Crystal System is monoclinic; C2.
Crystal Habits include striated bladed crystals to 1 - 2mm.
Cleavage none observed.
Fracture is not apparent.
Hardness is 5.5
Specific Gravity is approximately 3.9 g/cm³.
Streak is white.
Associated Minerals include aegirine, microcline and quartz.
Distinguishing Features: Crystal habit, color and luster.
Origin: Named in 1909 after its discovery locality on Joaquin Ridge,
   Mount Diablo Range, California, U.S.A.

CLASSIFICATION:

REFERENCES:
MinRec 21:315 (1990), Dana 8:1232 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

Legend