酸性岩-地球科学堆栈交换江南电子竞技平台江南体育网页版 最近30从www.hoelymoley.com 2023 - 07 - 08 - t13:15:29z //www.hoelymoley.com/feeds/question/4301 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/4301 7 酸性岩 少数民族工人 //www.hoelymoley.com/users/620 2015 - 01 - 21 t20:39:16z 2016 - 09 - 10 - t09:12:51z < p >我读到< em >酸性< / em >字符,或者,更好,< em >酸性< / em >字符的岩石是由内容超过65美元\ % \ \ ce {SiO_2} $。

A rock is defined, by the texts available to me, as mesosilicic (or intermediate) when its $\ce{SiO_2}$ content is contained in the interval $52\%-65\%$, while it is called hyposilicic (or basic) when $\ce{SiO_2}<52\%$.

If I correctly understand the $\ce{SiO_2}$ contained in the rock as a part of a mineral other than pure $\ce{SiO_2}$, for example, the $\ce{Si_2O_4}$ part of anorthite $\ce{CaAl_2Si_2O_8}$, is calculated into the quantity of total silica. What I cannot understand at all, is whether mass or volume is taken into account.

 //www.hoelymoley.com/questions/4301/-/4303 # 4303 6 弗雷德回答的酸性岩石 弗雷德 //www.hoelymoley.com/users/2470 2015 - 01 - 22 - t04:27:06z 2015 - 01 - 22 - t06:13:27z 网站显示< p > < a href = " http://www.tulane.edu/ ~ sanelson / eens212 / igrockclassif.htm " > http://www.tulane.edu/ sanelson / eens212 igrockclassif.htm杜兰大学的< / >二氧化硅含量火成岩是基于质量。下面是复制的web页面的相关部分州<强> wt % < / >强,重量百分比。

General Chemical Classifications

$\ce{SiO2}$ (Silica) Content

> 66 wt. % - Acid 52-66 wt% - Intermediate 45-52 wt% - Basic < 45 wt % - Ultrabasic
//www.hoelymoley.com/questions/4301/-/6826 # 6826 1 为酸性岩石Gimelist回答 Gimelist //www.hoelymoley.com/users/725 2015 - 10 - 31 - t08:37:55z 2015 - 10 - 31 - t08:37:55z < p >我想添加到弗雷德的回答,这是正确的。一些点:< / p > < blockquote > < p >如果我正确地理解\ ce {SiO_2}美元岩石中包含的非纯矿物\ ce {SiO_2},美元对仓库\ ce {Si_2O_4}钙长石的一部分美元\ ce {CaAl_2Si_2O_8},美元计算到总二氧化硅的量。< / p > < /引用> < p >这是不正确的。当计算酸性或岩石的基本性格,你必须考虑整个岩石,在所谓的“岩石”或“散装摇滚”组成。你不单独\ ce {SiO_2}各种矿物质的美元计算。< / p > < blockquote > < p >我无法理解是什么是否考虑质量或体积。< / p > < /引用> < p >一般的经验法则,岩石和矿物化学反应通常是计算使用质量(俗称重量在文献中)或摩尔比例,和几乎从不体积。< / p > < p >,我从来没有见过/ /内消旋/海波硅的专业文献中使用的条款(或任何其他文学)。除此之外,酸性一词起源于很久很久以前的时候认为硅是岩石中硅酸。这是现在已知是假的,在过去的几十年里,酸性和碱性下降的使用条款。硅的现在和镁铁质更常见。注意,显然,这只适用于火成岩和变质硅酸盐丰富的岩石。 You would not use that to describe rocks that are very poor in that stuff such as carbonatites, or sedimentary rocks such as phosphorites or evaporites.
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