xenomorphic


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xenomorphic

[¦zēn·ə¦mȯr·fik]
(mineralogy)
References in periodicals archive ?
The xenomorphic tetrahedrite and freibergite usually coexist with bournonite, boulangerite, jamesonite, chalcopyrite, and galena (Figures 4(n), 5(c), and 6).
(f) Assemblage 5 stibnite occurred among xenomorphic quartz grains.
The inner parts of the oncoids show a recrystallisation by xenomorphic sparitic calcite, and only occasionally an oncoid preserving remains of the original oncolitic lamination is recorded (micritized oncoids).
Finally a Glossary explains the scientific terms used in the mineral descriptions: about 400 of them, from acicular to xenomorphic: a useful tool to have, even beyond its use in conjunction with the Atlas descriptions.
These rocks are medium- to coarse-grained equigranular to inequigranular anhedral to euhedral with xenomorphic to idiomorphic granular texture.
Rounded xenomorphic botryoidal crystalline masses also occur.
On the other hand, the epidote amphibolite is classifiable between xenomorphic, i.e.
Albite has been found in clusters of tabular crystals in parallel growths up to 4 cm and, less commonly, in isolated xenomorphic or subidiomorphic crystals to several millimeter size.
Ankerite occurs as xenomorphic grains of microscopic size associated with siderite, calcite and dolomite in carbonate ores (Panto, 1956), and as idiomorphic crystals in barite veins.