swallowtail twinning
swallowtail twinning A type of crystal twinning in which one crystal divides into two along a twin plane, giving a twinned crystal in the shape of a ‘V’ or swallowtail. The mineral gypsum may develop this twinned form.
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Divide , di·vide / diˈvīd/ • v. 1. separate or be separated into parts: [tr.] consumer magazines can be divided into a number of different categories | [intr.… Shape , shape / shāp/ • n. 1. the external form or appearance characteristic of someone or something; the outline of an area or figure: she liked the shape o… divider , di·vid·er / diˈvīdər/ • n. 1. a person or thing that divides a whole into parts. ∎ an issue on which opinions are divided: the big divider was still… Chevron Marks , chevron marks A type of sole structure characterized by a linear pattern of small, V-shaped ridges formed by the dragging of an object over the surfa… Monotype , Monotype •gripe, hype, mistype, pipe, ripe, sipe, slype, snipe, stripe, swipe, tripe, type, wipe •guttersnipe • bagpipe • standpipe •tailpipe • drain… V , V, v [Called ‘vee’]. The 22nd LETTER of the Roman ALPHABET as used for English. It originated, along with F, U, W, Y, in the Phoenician consonant sym…
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swallowtail twinning