crystal twinning wikipedia - EAS

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  1. Crystal twinning occurs when two or more adjacent crystals of the same mineral are oriented so that they share some of the same crystal lattice points in a symmetrical manner. The result is an intergrowth of two separate crystals that are tightly bonded to each other.
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    What is crystal twinning?
    On the more perfect cleavage, which is parallel to the basal plane (P), is a system of fine striations, parallel to the second cleavage (M). Crystal twinning occurs when two separate crystals share some of the same crystal lattice points in a symmetrical manner.
    en.wikipedia.org/wiki/Crystal_twinning
    What is Merohedral twinning?
    Merohedral twinning occurs when the lattices of the contact twins superimpose in three dimensions, such as by relative rotation of one twin from the other. An example is metazeunerite. In penetration twins the individual crystals have the appearance of passing through each other in a symmetrical manner.
    en.wikipedia.org/wiki/Crystal_twinning
    How do Crystallographers classify twinned crystals?
    Crystallographers classify twinned crystals by a number of twin laws. These twin laws are specific to the crystal system. The type of twinning can be a diagnostic tool in mineral identification. Twinning is an important mechanism for permanent shape changes in a crystal.
    en.wikipedia.org/wiki/Crystal_twinning
    What are the types of twinned crystals?
    In the triclinic system, the most commonly twinned crystals are the feldspar minerals plagioclase and microcline. These minerals show the Albite and Pericline Laws. Simple twinned crystals may be contact twins or penetration twins. Contact twins share a single composition surface, often appearing as mirror images across the boundary.
    en.wikipedia.org/wiki/Crystal_twinning
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    https://en.wikipedia.org/wiki/Crystal_twinning

    Crystal twinning occurs when two or more adjacent crystals of the same mineral are oriented so that they share some of the same crystal lattice points in a symmetrical manner. The result is an intergrowth of two separate crystals that are tightly bonded to each other. The surface along which the … 查看更多內容

    Twinning is a form of symmetrical intergrowth between two or more adjacent crystals of the same mineral. It differs from the ordinary random intergrowth of mineral grains in a mineral deposit, because the relative … 查看更多內容

    Twin laws圖片

    Simple twinned crystals may be contact twins or penetration twins. Contact twins meet on a single composition plane, often appearing as … 查看更多內容

    Modes of formation圖片
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    Types of twinning圖片

    Twin laws are symmetry operations that define the orientation between twin crystal segments. These are as characteristic of the mineral as are its crystal face angles. For example, … 查看更多內容

    There are three modes of formation of twinned crystals. Growth twins are the result of an interruption or change in the lattice during formation or growth due to a possible deformation from a larger substituting ion. Annealing or transformation … 查看更多內容

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  4. Crystal twinning - Wikiwand

    https://www.wikiwand.com/en/Crystal_twinning

    網頁2023年1月2日 · Crystal twinning occurs when two or more adjacent crystals of the same mineral are oriented so that they share some of the same crystal lattice points in a …

  5. Physics:Crystal twinning - HandWiki

    https://handwiki.org/wiki/Physics:Crystal_twinning
    • Twinning is a form of symmetrical intergrowth between two or more adjacent crystals of the same mineral. It differs from the ordinary random intergrowth of mineral grains in a mineral deposit, because the relative orientations of the two crystal segments show a fixed relationship that is characteristic of the mineral structure. The relationship is ...
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  6. https://en.wikipedia.org/wiki/Talk:Crystal_twinning
    • This paragraphs seems to me to be thoroughly misleading, though I'm not expert enough in the topic to edit it. I hope someone will. The impression is given that the difference in orientation of the two crystals sharing a twin boundary is necessarily slight. That's only a very special case (called "pseudo-merohedry" ). In general, there is NO distin...
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    • 孪晶 - 维基百科,自由的百科全书

      https://zh.wikipedia.org/wiki/孪晶

      孪晶是指:由两个或者两个以上同种晶体构成的﹑非平行的规则连生体。又称双晶。在构成孪晶的两个单晶体间﹐必然会有部分的对应晶面﹑对应晶棱相互平行﹐但不可能全部一一平行﹐然而它们必可通过某一反映﹑旋转180°或者反伸(倒反)的对称操作而达到彼此重合或者完全平行。

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      • Crystal twinning | Detailed Pedia

        https://www.detailedpedia.com/wiki-Crystal_twinning

        網頁Crystal twinning. Quartz – Japan twin. Diagram of twinned crystals of albite. On the more perfect cleavage, which is parallel to the basal plane (P), is a system of fine striations, …

      • Crystal twinning

        https://wblog.wiki/vo/Crystal_twinning

        網頁Spinel law contact twinning. A single crystal is shown at left with the composition plane in red. At right, the crystal has effectively been cut on the composition plane and the front …

      • Crystal habit - Wikipedia

        https://en.wikipedia.org/wiki/Crystal_habit

        網頁24 列 · Factors influencing habit include: a combination of two or more crystal forms; trace impurities present during growth; crystal twinning and growth conditions (i.e., heat, …

      • 7.docx - Crystal twinning From Wikipedia, the free...

        https://www.coursehero.com/file/114993330/7docx

        網頁View 7.docx from BSBDIV 501 at Holmes Colleges Melbourne. Crystal twinning From Wikipedia, the free encyclopedia Jump to navigationJump to search This article needs …

      • https://en.wikipedia.org/wiki/Twinning

        網頁Twinning (making a twin of) may refer to: In biology and agriculture, producing two offspring (i.e., twins) at a time, or having a tendency to do so; Twin towns and sister cities, towns …



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