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Hingganite-(Ce)
Ce2Be2(SiO4)2(OH)2

     A recent addition to the suite of minerals at mont Saint-Hilaire in 2006. This species has been re-validated and approved by the International Mineralogical Association in 2004 as IMA 2004-004. The description of this "new species" was accepted for publication in June 2006. It is a member of the datolite - gadolinite group. Hingganite-(Ce) was formerly designated as MSH UK-48A at mont Saint-Hilaire.

     This species was collected in 1978 for the first time at MSH. Hingganite-(Ce) is often girdled by spherulitic masses of hellandite group crystals, in some instances nearly completely envelopping the crystals so that only their diamond-shaped faces are apparent.

PHYSICAL CHARACTERISTICS:

Color is normally light grey.
Luster is vitreous.
Diaphaneity is transparent to translucent.
Crystal System is monoclinic; P21/a.
Crystal Habits prismatic crystals to 1mm in length and 0.1 - 0.2 mm in width terminated by a diamond-shaped face which appears to be orthogonal to the elongation.
Cleavage: none.
Fracture is uneven.
Hardness is > 6 - 7.
Specific Gravity is approximately 3.27 g/cm3.
Streak is white.
Associated Minerals include ancylite-(Ce), catapleiite, fluorite, natrolite, nenadkevichite, pyrophanite, titanite and zircon.
Distinguishing Features: Brittle. No fluorescence observed.
Origin: Named in 1987 for its locality Heilongjiang, and greater
   Khingan area, Manchuria, China. Re-validated in 2004.

CLASSIFICATION:

Dana class # 54.2.1a.2

Strunz class # VIII/B.29-80

REFERENCES:
Dana 8:1122 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
--

MX
--

SS
--

MC
--

HF
--

BR
--

SX
--

FR
--

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