tabular crystal

tabular crystal

[′tab·yə·lər ′krist·əl]
(crystallography)
A crystal that appears broad and flat due to two prominent parallel faces.
References in periodicals archive ?
5 cm in diameter from Eden Mills, Vermont, and a fantastic matrix specimen of Madagascar pezzottaite, with a central, bright pink, tabular crystal about 5 cm across.
Barite mineralization in Kalana occurs in two generations--euhedral bladed-tabular barite zonal crystals from a few to 10 cm in size, growing on the limestone-dolomite wall-rock (generation I), and sparsely placed thin tabular crystals a few millimetres thick and up to 1 cm in size, growing on calcitic crusts (generation II).
The platy and tabular crystals of drug were seen entangled with lauric acid crystals show the entrapment of acicular and platy crystals of drug in fatty acid (myristic acid, palmitic acid, and stearic acid) matrix (Figure.
Tabular crystals with both cube and tetrahexahedron faces are rare.
However, at high magnification it became evident that these were not single crystals, but layers of polyhedral plates resembling tabular crystals, which formed lamellar-like stacks (Fig.
It forms hexagonal, thin to thick tabular crystals to about 200 [micro]m.
The crystals tend to be rather elongated in comparison to the more tabular crystals from the Mowbray mine.
The tabular crystals, several of which are twinned, have been identified by their crystal morphology and by chemical analysis (B.
Linear crystals in radial habits and tabular crystals in rosette habits both reflect conditions of rapid crystal growth from highly supersaturated solutions.
Gemmy lime-green fluorite forms slightly rough dodecahedral crystals to 5 cm on glittering matrix composed of snowy white crests of parallel albite ("cleavelandite") crystals shot through with sleek, striated crystals of jet-black schorl; on other pieces, translucent pink apatite-(CaF) (formerly known as fluorapatite) forms lustrous tabular crystals to 7 cm, in parallel aggregates resting lightly on the same albite/schorl matrix.
But summer of 2007 saw a discovery in a quarry near the town of Jalna (southeast of Jalgaon) which produced flat matrix plates 4 to 15 cm across with very thin, colorless, transparent, tabular crystals of barite, uniformly around 1.