https://padlet.com/yangshulinedu/4ypigqtcam8v 晶体的思考 en-us 2017-11-02 13:06:16 UTC 2017-11-30 09:26:36 UTC hello@padlet.com https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160609 晶体:长程有序，晶体拥有固定的熔点，在熔化过程中，温度始终保持不变。有单晶体和多晶体，有机晶体，无机晶体。
例如:石墨烯，金刚石]]> 2017-11-03 01:59:18 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160609 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160615 有固定的熔点，排列长程有序，原子规则堆垛
如:石英，金刚石]]> 2017-11-03 01:59:19 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160615 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160618 2017-11-03 01:59:21 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160618 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160621 2017-11-03 01:59:22 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160621 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160636 晶体有固定rongdian]]> 2017-11-03 01:59:30 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160636 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160641 2017-11-03 01:59:32 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160641 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160657 2017-11-03 01:59:40 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160657 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160667 长]]> 2017-11-03 01:59:48 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160667 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160674 2017-11-03 01:59:50 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160674 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160683 常见的晶体,nacl,硅]]> 2017-11-03 01:59:53 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160683 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160720 2017-11-03 02:00:17 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160720 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160802 比如:金刚石、雪花等]]> 2017-11-03 02:00:50 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160802 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160806 2017-11-03 02:00:53 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160806 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160829 是分子、原子、离子在三维空间作有规律的周期性重复排列所形成的物质。]]> 2017-11-03 02:01:04 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160829 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160831 石墨]]> 2017-11-03 02:01:04 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160831 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160855 2017-11-03 02:01:13 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160855 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160869 晶体即是物质的质点（分子、原子、离子）在三维空间作有规律的周期性重复排列所形成的物质。
例如]]> 2017-11-03 02:01:20 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160869 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160882 2017-11-03 02:01:24 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160882 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160889 晶体（crystal）是有明确衍射图案的固体，其原子或分子在空间按一定规律周期重复地排列。晶体中原子或分子的排列具有三维空间的周期性，隔一定的距离重复出现，这种周期性规律是晶体结构中最基本的特征。
固态物质分为晶体和非晶体。从宏观上看，自然凝结的、不受外界干扰而形成的晶体都有自己独特的、呈对称性的形状，如食盐呈立方体；冰呈六角棱柱体；明矾呈八面体等。
当晶体从外界吸收热量时，其内部分子、原子的平均动能增大，温度也开始升高，但并不破坏其空间点阵，仍保持有规则排列。继续吸热达到一定的温度──熔点时，其分子、原子运动的剧烈程度可以破坏其有规则的排列，空间点阵也开始解体，于是晶体开始变成液体。在晶体从固体向液体的转化过程中，吸收的热量用来一部分一部分地破坏晶体的空间点阵，所以固液混合物的温度并不升高。当晶体完全熔化后，随着从外界吸收热量，温度又开始升高。而非晶体由于分子、原子的排列不规则，吸收热量后不需要破坏其空间点阵，只用来提高平均动能，所以当从外界吸收热量时，便由硬变软，最后变成液体。玻璃、松香、沥青和橡胶就是常见的非晶体。]]> 2017-11-03 02:01:29 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160889 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160970 2017-11-03 02:02:00 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160970 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160989 2017-11-03 02:02:06 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203160989 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161034 2017-11-03 02:02:23 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161034 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161051 2017-11-03 02:02:28 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161051 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161065 2017-11-03 02:02:32 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161065 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161101 2017-11-03 02:02:51 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161101 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161146 硅，锗，金刚石]]> 2017-11-03 02:03:09 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161146 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161161 2017-11-03 02:03:19 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161161 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161187 2017-11-03 02:03:28 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161187 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161188 2017-11-03 02:03:29 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161188 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161223 2017-11-03 02:03:44 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161223 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161231 2017-11-03 02:03:50 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161231 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161319 2017-11-03 02:04:47 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161319 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161380 2017-11-03 02:05:04 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161380 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161396 傻子不是人吗]]> 2017-11-03 02:05:15 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161396 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161403 2017-11-03 02:05:17 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161403 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161420 2017-11-03 02:05:25 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161420 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161426 2017-11-03 02:05:28 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161426 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161442 2017-11-03 02:05:40 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161442 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161451 石墨]]> 2017-11-03 02:05:42 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161451 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161508 2017-11-03 02:06:04 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161508 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161576 2017-11-03 02:06:31 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161576 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161581 2017-11-03 02:06:33 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161581 https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161798 怎么说]]> 2017-11-03 02:08:08 UTC https://padlet.com/yangshulinedu/4ypigqtcam8v/wish/203161798