Sections
Thumbnails

Ferrokentbrooksite crystals - click for larger pic
Ferrokentbrooksite crystals
© Douglas Merson

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

Ferrokentbrooksite crystals - click for larger pic
Ferrokentbrooksite crystals
© Jason B. Smith

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

Search this site

Powered by FreeFind

Home > Mineral Descriptions > Ferrokentbrooksite (TL) - (4 Photos)



Ferrokentbrooksite (Type Locality)
Na15Ca6(Fe,Mn)3Zr3NbSi25O73(O,OH,H2O)3(Cl,F,OH)2

     Ferrokentbrooksite, is a new member of the eudialyte group from Mont Saint-Hilaire, Quebec; it is the ferrous-iron-dominant analogue of kentbrooksite. It cannot be distinguished visually from other eudialyte group minerals present at MSH.

PHYSICAL CHARACTERISTICS:

Color is reddish-brown to red.
Luster is vitreous.
Diaphaneity is transparent.
Crystal System is trigonal, R3m.
Crystal Habits include pseudo-octahedral crystals to 1 cm in diameter
Cleavage none, no parting.
Fracture is uneven to conchoidal.
Hardness is ~ 5 - 6.
Specific Gravity is > 3.06 g/cm3.
Streak is white.
Associated Minerals include aegirine, albite, ancylite-(Ce), calcite,
   catapleiite, fluorite, fluorapatite, gonnardite, microcline, nepheline
   (partially altered to natrolite), natrolite, rhodochrosite and sérandite.
Distinguishing Features: Requires analysis for confirmation. Brittle.
Origin: Named in 2003 to reflect its composition; the ferrous-iron
   dominant analogue of kentbrooksite.

CLASSIFICATION:

Dana System
# 64.1.1.7

Strunz Classification
# VIII/E.25-60

REFERENCES:
CanMin 41:55-60 (2003)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
--

MX
--

SS
--

MC
--

HF
--

BR
--

SX
--

FR
--

Legend