harmotome


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harmotome

(ˈhɑːməˌtəʊm)
n
(Minerals) a mineral of the zeolite group consisting of hydrated aluminium barium silicate in the form of monoclinic twinned crystals. Formula: Ba(Al2Si6O16).6H2O
[C19: from French, from Greek harmos a joint + tomē a slice, from temnein to cut]
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References in periodicals archive ?
Other than harmotome, brewsterite-Ba is the only barium-dominant zeolite known from the Grenville Province.
Older classification used the name wellsite for a mineral with an intermediate chemical composition between phillipsite and harmotome.
These biggies included matlockite, greenockite, harmotome, susannite, and others from Scottish localities.
Harmotome is extremely rare at the Francon quarry, known from only a few confirmed specimens.
5 cm sitting straight up on white calcite druses over basalt, red heulandite and blocky white hydroxylapophyllite crystals in stately groups, and, of course, the classic harmotome from Strontian, in magnificent crystal clusters with individuals to 3 cm across.
Zeolite crystals visually identifiable as phillipsite or harmotome are well-known as last-formed minerals in carbonate veins, braunite fractures and tinzenite druses (Antofilli et al.
A large number of harmotome crystals from microscopic size up to 1 cm have been found, especially from the northern Vinoren area, and also from the southern Vinoren area, in the Gottes Hulfe in der Noth, Mildigkeit Gottes and Kjennerud mines.
Species confirmed by X-ray diffraction during this study include alstonite, anglesite, ankerite, aragonite, barytocalcite, barite, brochantite, epsomite, harmotome, hydromagnesite, jarosite, marcasite, melanterite, millerite, serpierite, siderite, sulfur and witherite.
a collecting effort in May 1998 at the Whitesmith Workings, Beinn Resipol, Strontian, Argyll, Scotland, yielded some spectacular specimens of harmotome from this famous locality for this rare zeolite species.