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Ranciéite
(Ca,Mn)Mn44+O9 · 3 H2O

     A new mineral species for MSH in 2006. Occurs as blackish alterations on rhodochrosite and/or siderite, identified by Al Falster, University of New Orleans.

PHYSICAL CHARACTERISTICS:

Color is brownish or black.
Luster is metallic to dull.
Diaphaneity is transparent to opaque.
Crystal System is hexagonal; (??).
Crystal Habits blackish alterations.
Cleavage: none.
Fracture is (??).
Hardness is 2.5 - 3.
Specific Gravity is approximately 3.1 g/cm3.
Streak is dark brown.
Associated Minerals include rhodochrosite and siderite.
Distinguishing Features: none.
Origin: Named for its locality, Rancié, near Vicdessos, Ariège, France in 1859.

CLASSIFICATION:

Dana class # 7.10.1.1

Strunz class # IV/D.12-10

REFERENCES:
Dana 8:325 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
--

MX
--

SS
--

MC
--

HF
--

BR
--

SX
--

FR
--

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