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pinacoid

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pinacoid
pinacoid, pinakoid, a. and n. Cryst. (ˈpɪnəkɔɪd) [f. Gr. πίναξ, πινακ- slab: see -oid.] A. adj. Applied to any plane, in a crystallographic system, intersecting one of the axes of co-ordinates and parallel to the other two. Opposed to octahedrid and prismatoid.1895 Story-Maskelyne Crystallogr. ii. §... Oxford English Dictionary
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Bournonite
The crystals are orthorhombic, and are generally tabular in habit owing to the predominance of the basal pinacoid; numerous smooth bright faces are often wikipedia.org
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pinakoid
pinakoid, -al variants of pinacoid, -al. Oxford English Dictionary
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Metarauchite
Displays thick tabular crystals, with a prevalent pinacoid (011). Metarauchite is very brittle and shows perfect cleavage along the {011} plane. wikipedia.org
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Cleavage (crystal)
The classic example of cleavage is mica, which cleaves in a single direction along the basal pinacoid, making the layers seem like pages in a book. This gives graphite a single direction of cleavage, parallel to the basal pinacoid. wikipedia.org
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orthophony
orthophony, -pinacoid, -al see ortho-. Oxford English Dictionary
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Scolecite
Twinning on the ortho-pinacoid is usually evident. wikipedia.org
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basal
basal, a. (n.) (ˈbeɪsəl) [f. base n. + -al1.] A. adj. 1. Pertaining to, situated at, or forming the base. In Bot. Situated at the base of the ovary. basal plane and basal cleavage in Cryst.: one parallel to the lateral or horizontal axis.1828 Kirby & Sp. Entomol. III. xxxii. 330 The elytra have a ba... Oxford English Dictionary
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Cyrilovite
Crystals are squat and when single tend to lie on the basal pinacoid. The pinacoid {001} and the dipyramid {113} are the dominant forms; all the faces of these forms tend to be present and equally well developed. wikipedia.org
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clino-
clino- Min. (ˈklaɪnəʊ) Combining form of Gr. stem κλιν- in the sense of ‘sloping, inclining’ (cf. κλῑ́ν-η bed, κλῑ́ν-ειν to slope, slant, ἀκλινής unbent); used in connexion with the monoclinic system of crystals, characterized by one plane of symmetry. 1. In names of minerals, as ˈclinochlore [Gr. χ... Oxford English Dictionary
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Cesanite
distorted by a flatting that occurs down the length of the crystal which then extends down with two parallel faces until they are cut off by either a pinacoid wikipedia.org
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klino-
klino- (klaɪnəʊ) var. of clino-, as in klinoclase, klino-crocite, klino-humite, klino-meter, klino-phæite, klino-pinacoid, klino-rhombic, etc.; also klinocephalic (-sɪˈfælɪk), -cephalous (-ˈsɛfələs), adjs., having a saddle-shaped depression at the vertex of the skull; hence klinoˈcephalism, -ˈcephal... Oxford English Dictionary
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Biotite
It has a monoclinic crystal system, with tabular to prismatic crystals with an obvious pinacoid termination. It has four prism faces and two pinacoid faces to form a pseudohexagonal crystal. wikipedia.org
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twinning
▪ I. twinning, vbl. n.1 Obs. exc. Sc. (ˈtwɪnɪŋ) [f. twin v.1 + -ing1.] The action of twin v.1; parting, separation.a 1225 Ancr. R. 396 Þe soule luueð þet bodi..& þet is eðcene iðe twinnunge. c 1374 Chaucer Troylus iv. 1303 Þe twynnynge of vs twayne Wol vs dishese and cruwellyche anoye. c 1425 tr. Ar... Oxford English Dictionary
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Black Star sapphire
Hematite-ilmenite needles, which are responsible for the golden colour, intersect at about 120 degrees in a three-fold direction of the basal pinacoid. wikipedia.org
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