科学与数学crystalverse.com
如何在家培养氯化钠晶体
How to grow sodium chloride crystals at home
2021 — 2024，它一次次回到首页
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导读
这篇教程介绍如何在家培育氯化钠（食盐）晶体，属于网站上一系列详细的晶体培养指南之一。评论提到文中也谈到天气等环境条件会影响晶体生长。
为什么经久不衰：因为它把一个小众但经典的动手实验讲得细致、可操作且不标题党，晶体生长又兼具化学教育与视觉乐趣，所以多年后仍被反复推荐。
HN 评论精选
家长分享学校晶体作业因截止日期不合理导致晶体反复搬运受损，并反思过度认真。
我女儿有个学校作业，有点像比赛，我们四天内就长出了不少和网站上晶种质量差不多的晶体，而这是最初（我认为考虑不周）的截止期限。问题是其他人都没能或没兴趣这么快做出来，所以截止日期已经拖了几周，我们最好的晶体来回带去学校几次，被刮花、碰坏，而不是安安静静继续生长。有点令人沮丧。我现在想起我像她这么大时，把学校的事太当真、结果发现你比老师还在意，是多么令人挫败。
fcatalan查看英文原文
My daughter has this as an school assignment, with some implication that it is some sort of a contest, and we managed to grow quite a few of similar quality to the seed crystals on the site in 4 days, which was the original (poorly thought IMO) deadline. The trouble is that no one else was able or cared to do it so fast, so the deadline has been slipping for a couple weeks now, with our best crystals going to school and back a few times, getting scratches and broken bits instead of nicely growing undisturbed. A bit discouraging. I'm now remembering how frustrating was for me to take school related things too seriously and discover you cared more than your teachers when I was her age.
专业化学家分享反溶剂扩散法可获得更可重复的晶体生长。
我做有机化学家时，培养晶体对某些用 X 射线晶体学确定结构至关重要（用来回答“我是否真的做出了我以为做出的东西？”）。对敏感化合物，有时不能只是让溶剂蒸发。而且正如文章所说，天气条件也可能坏事。我认为我们解决这个问题最酷的技巧，是让反溶剂通过渗透/扩散进入饱和溶液：将装有化合物或盐饱和溶液的小密封容器扎孔，放入装有对该化合物更差但可互溶溶剂的大密封容器中。只要控制温度，缓慢扩散进内层容器就能非常可重复地生长晶体。
isoprophlex查看英文原文
When I was an organic chemist, growing crystals was of paramount importance for certain structure determinations using X-ray crystallography (to answer "did I really prepare what I think I prepared?") With sensitive compounds, sometimes you can't just let things evaporate. Also as the article states, weather conditions might mess you up. IMO the coolest trick we had to solve this was osmosis of an anti-solvent into a saturated solution. A small sealed container with a saturated solution of your compound/salt is punctured, and put in a bigger sealed container containing a worse but miscible solvent for the compound under study. Slow diffusion into the inner container causes very reproducible crystal growth, as long as you can control the temperature.
称赞站点内容详实、无标题党，并推荐硫酸铜晶体页面。
这个网站上的其他内容简直太棒了。我很高兴互联网上还有这样的东西。没有标题党或剥削性内容，只是关于一个有趣小众主题的非常详细的指导知识。如果你想看真正视觉上令人印象深刻的东西，可以看看他的硫酸铜晶体。
voldacar查看英文原文
The rest of the content on this website is simply amazing. I'm so glad stuff like this is still out there on the internet. Nothing clickbaity or exploitative, just really detailed instructional knowledge on an interesting niche subject. Check out his copper sulfate crystals if you want something really visually impressive: https://crystalverse.com/best-way-to-grow-copper-sulfate-crystals/
推荐酒石酸钙作为快速、宽容的入门晶体实验并给出配方。
酒石酸钙是很好的高速入门晶体培养项目，因为它很宽容且“神奇”，几秒钟就能得到约毫米级晶体；一旦上瘾，你可以再尝试需要更多耐心和技巧的晶体。你需要酒石酸氢钾（塔塔粉）、碳酸氢钠（小苏打）和氯化钙（以 DampRid 或 Pickle Crisp 出售）。在一杯蒸馏水中加入一勺小苏打和一勺塔塔粉，它们会起泡，因为小苏打中和塔塔粉的酸性并释放 CO2；这正是你想要的，因为酒石酸的混合中性盐更易溶于水。搅拌并等起泡平息，然后逐渐少量搅入更多塔塔粉，直到不再溶解，让固体沉降。同时在第二杯水中溶解一勺氯化钙。等第一杯残留固体沉降后，将清液倒入另一个杯子，再搅拌加入氯化钙溶液；几秒钟内应看到闪亮的针状晶体从溶液中落下。
philipkglass查看英文原文
Calcium tartrate is a great high speed introduction to crystal growing because it is very forgiving and "magical." You can get ~millimeter size crystals in seconds. Then once you're hooked you can try growing crystals that require more patience/technique. If you ever saw the demonstration of lead (II) iodide precipitating from solution [1], this demonstration looks similar except that the crystals are sparkly and colorless instead of sparkly and golden. You'll need potassium hydrogen tartrate (cream of tartar), sodium hydrogen carbonate (baking soda), and calcium chloride (sold as DampRid or Pickle Crisp). Add a spoon full of baking soda and a spoon full of cream of tartar to a glass of distilled water. They should fizz together as the baking soda neutralizes the acidity of the cream of tartar, releasing CO2. This is what you want, since the mixed neutral salt of tartaric acid is more soluble in water. Stir and wait for the fizzing to die down, then gradually stir in small portions of more cream of tartar until the additions stop dissolving. Let the solids settle in the glass. Meanwhile, dissolve a spoon full of calcium chloride in a second glass of water. It should dissolve readily with a bit of stirring. Once residual solids have settled in glass one, decant the clear liquid into another glass. Now pour the clear decanted liquid into the calcium chloride solution with stirring. Within seconds, you should see sparkling needles rain out of the solution. These are your crystals. The transition is especially striking in direct sunlight. The crystals can be saved and seem to remain stable in air regardless of ambient humidity. I unfortunately have not seen this demonstration written down elsewhere so I can't offer a citation. I came to it by personal experience when I was on a crystal growing kick as a kid. (Though it may well have been written down somewhere that I have never come across.) [1] Like in this video: https://www.youtube.com/watch?v=AO67MnZaAvQ
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