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Pyrochlore crystals - click for larger pic
Pyrochlore crystal
R. O. M. Specimen #44877
Photo by Violet Anderson
© Royal Ontario Museum

Pyrochlore crystals - click for larger pic
Pyrochlore crystals
© Doug Merson

Pyrochlore crystals - click for larger pic
Pyrochlore crystals
© Doug Merson

Pyrochlore crystals - click for larger pic
Pyrochlore crystals
© Modris Baum

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Home > Mineral Descriptions > Pyrochlore - (7 Photos)



Pyrochlore
(Na,Ca)2Nb2O6(OH,F) · nH2O

     Pyrochlore is relatively common at MSH.

PHYSICAL CHARACTERISTICS:

Color is usually brown, orange-yellow or reddish brown.
Luster is vitreous to adamantine.
Diaphaneity is transparent to translucent.
Crystal System is isometric; Fd3m.
Crystal Habits include sharp octahedral crystals to 1mm sprinkled
   on various minerals, very rarely as rosettes, irregular grains and
   embedded granular masses.
Cleavage {111} is distinct (sometimes).
Fracture is subconchoidal to uneven.
Hardness is 5 - 5.5
Specific Gravity is approximately 4.45 g/cm3.
Streak is light brown.
Associated Minerals include aegirine, albite, amphibole group,
   analcime, ancylite, astrophyllite, biotite, calcite, catapleiite, chlorite
   group, elpidite, epididymite, fluorite, genthelvite, leucophanite,
   microcline, natrolite, polylithionite, rhodochrosite, rutile, sérandite
   and wurtzite.
Distinguishing Features: Crystal habit and luster.
Origin: Named in 1826 from the Greek pyr, fire, plus chloros,
   greenish yellow, alluding to its color when heated.

CLASSIFICATION:

Dana System
# 8.2.1.1

Strunz Classification
# IV/C.17-10

REFERENCES:
MinRec 21:330-331 (1990), Dana 8:343-344 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
¤¤

AP
¤¤

MX
--

SS
--

MC
--

HF
--

BR
--

SX
¤¤

FR
--

Legend

Pyrochlore crystals - click for larger pic
Pyrochlore crystals
© Stephan Wolfsried

Pyrochlore crystals - click for larger pic
Pyrochlore crystals
© Stephan Wolfsried

Pyrochlore crystals - click for larger pic
Pyrochlore crystals
© Steven Stuart