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Questions tagged [minerals]

For questions about minerals, i.e. naturally occurring crystalline chemical compounds. Also consider [metallurgy].

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3answers
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Structure of Ca2B6O11

What is its structure? I found an image of $\ce{B6O11}$ unit, but it looks incorrect: The top left corner one. The oxygen can make max 2 bonds but atom $\mathrm{O8}$ has three! There are ...
11
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2answers
263 views

Can olivine be used to make glass?

This concerns ongoing work to find a plausible approach to large-scale production of clear glass on the Moon. It's for an ultra-hard science fiction project and I really want to get it right. Olivine ...
9
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1answer
5k views

Will we ever run out of gold, silver, copper and other important conductors? [closed]

Conductors are very important in technology. At the current rate of extraction how long until the world's reserves of copper are depleted?
7
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1answer
121 views

Can glass be made with anorthite?

The lunar highlands are made mostly of anorthosite (90% anorthite, the rest oxides of magnesium, iron, a little titanium, and traces of others), and pretty pure anorthite ($\ce{CaAl2Si2O8}$) is common....
7
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1answer
145 views

If I were to create a fictional way to obtain elements from Granite, what would be a good approach?

Notes: This question is in regard to my Minecraft mod. To those who don't know, Minecraft is a first person survival game by Mojang, where the players' objective is to become self sufficient and ...
6
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1answer
245 views

Is there any way to refine Feldspar?

Feldspars are mostly composed of three compounds: KAlSi$_3$O$_8$ NaAlSi$_3$O$_8$ CaAl$_2$Si$_2$O$_8$ I notice they each have Aluminum. Feldspar is far more common than Bauxite (the only Aluminum ore ...
6
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0answers
65 views

How well will molten iron chrysolite (fayalite) react with hydrogen?

The equation balances nicely, but would the reaction tend to proceed this way? What temperature and time would be needed? $\ce{Fe2SiO4 + 2H2 -> 2H2O + 2Fe + SiO2}$ There is no problem with ...
5
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2answers
15k views

What is chemical formula of Bauxite?

My book says Aluminium is extracted from its ore bauxite $\ce{Al2O3.nH2O}$ What does "n" stands for? Does it mean that there is no fixed amount of water in bauxite?
5
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1answer
253 views

Can acid mine drainage form acid rain?

Can acid mine drainage form acid rain? Since normal acid rain is formed via combustion of fossil fuels, the sulphur dioxide and nitrogen dioxide are all in the gas phase, whereas in acid mines the ...
5
votes
1answer
136 views

Glowing stone - Scarab carving

I have an intriquing question and, after searching whole Google, found almost no information. I simply don't know where else to look for answer and so I am asking you. When I was a child, my parents ...
5
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1answer
926 views

Why don't minerals evaporate from seawater along with the water? [duplicate]

When water evaporates from the ocean, of course the minerals such as salt remain in the ocean-- that's why seawater is so saline. However, I'm very puzzled: why don't minerals evaporate along with the ...
4
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1answer
59 views

Would adding water to a fish tank with sand lower the level of sand?

Let's say I have a typical 10 gallon tank with dimensions 10" x 20" x 12", and it's filled halfway (5" in height) with dry sand for hermit crabs. If I fill the tank up with water, will the level of ...
4
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1answer
130 views

Best x-ray dopant?

An x-ray computed tomography scanner has been used in an attempt to look at the pore space of a limestone rock sample (a carbonate, $\ce{CaCO3}$) saturated with a $\mathrm{12\ wt\%}$ sodium iodide ($\...
4
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1answer
108 views

Liquid that does not spoil for a mineral aquarium

I want to create a decoration - a mason jar "aquarium". I want to take a large mason jar, put some nice mineral specimens in it, fill the jar with liquid and seal it with lid. I believe I can't use ...
4
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0answers
92 views

Sense of radii quotient to determine coordination number in crystals?

Every common textbook explains the method of the radii quotient between the cation and anion of a selected salt to determine to coordination number(s) in that salt. For example deduce "Inorganic ...
4
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0answers
50 views

Detect a baked diamond?

Diamond suppliers often "bake" stones. This causes them to expel yellow-causing nitrogen and become white, but also makes them more brittle. A baked diamond can often be recognized by its unnatural ...
3
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4answers
6k views

Melting point of obsidian

I have tried 4 experiments at various temperatures to melt obsidian. At varying temperatures it just bubbles up and I don't seem to reach a melting point. Do you know what gases obsidian might ...
3
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1answer
143 views

How are Uranium and such materials made

I was wondering, how are materials like uranium, plutonium and other radioctive materials made. Do they all come from the old exploded stars and just been in the mountains for millions of years. Is ...
3
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1answer
2k views

What is the oxidation state of copper and iron in chalcopyrite?

What is the oxidation state of Cu and Fe in chalcopyrite ($\ce{CuFeS2}$)? Some websites tell that it is $\ce{Cu(I)Fe(III)S2}$, and others tell that it is $\ce{Cu(II)Fe(II)S2}$. Which is right?
3
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1answer
66 views

Testing for asbestos using readily available chemicals and tools?

Given that it is difficult to determine who is telling the truth in the recent claim that J&J covered up finding asbestos in their powder, is there any chemical test that we can perform on our own ...
3
votes
1answer
38 views

Does simmering sparkling water change/decrease its mineral composition significantly?

I know that heating sparkling water will cause it to lose $\ce{CO2}$. Does this have any other effects on the water that remains, such as reducing its mineral content? I understand when non-...
3
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1answer
33 views

Must a sample of a deuterated compound be isotopically pure for kinetic isotope experiments?

I'm trying to do a project on the primary kinetic isotope effect on the dehydroxylation of $\alpha-FeOOH$, goethite. The goethite consists of edge-sharing double octahedra of 3 oxyanions and 3 ...
3
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1answer
118 views

What is the chemical reason talc is used in water-based paint and not in solvent based paint?

As I understand, paints & coatings use talc predominately in water-based products and not in solvent-based products. Why is this? Is it because the solvent-based products don't need fillers? Or do ...
2
votes
1answer
368 views

What happens to minerals once you boil off liquid in a water and fat mixture?

Let us say you are cooking a curry. As water evaporates the minerals will become more and more concentrated in the curry's water but they will not deposit in the fat which would be at the top layer ...
2
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1answer
426 views

Beryl is a mineral which contains 5.03% Be, 10.4% Al, 35.5% Si and 53.58% O. What is the simplest formula for beryl?

So I tried to follow a 3 step rule to solving this equation: Divide each % by it's own atomic mass Dived each of those by whichever is smallest Find the lowest whole # Be = 5.03% / 9 = .558 ...
2
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0answers
37 views

Can minerals form in the subsurface?

Can gypsum form in the subsurface? If there is another source of sulfate and maybe limestone dissolution happening, if the ionic strength is high enough can gypsum crystals form in groundwater?
1
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2answers
56 views

Chemical formula of fluoroapatite

My textbook says the formula for fluoroapatite is $\ce{CaF2 * 3Ca3(PO4)2}$, whereas according to Wikipedia it's $\ce{Ca5(PO4)3F}$. What is the correct chemical formula of fluoroapatite and why there ...
1
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2answers
5k views

Is iron pyrite dangerous to handle?

I have a cube of pyrite similar to: (Source: Britannica) Can pyrite turn into sulfuric acid? Is this dangerous for me to touch, especially if my hands are sweaty?
1
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1answer
165 views

Strontium is more common than sulfur?

I was really surpised to see that strontium is apparently more common than sulfur in the earth's crust, since it occurs in what I thought were pretty rare minerals. Sulfur which seems to be ...
1
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2answers
161 views

Which definition of an ore is correct?

In metallurgy, an ore is defined as that mineral from which metal can be obtained with economic viability. I have also read that ores are rocks from which minerals or metals can be extracted ...
1
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1answer
99 views

How can I obtain oxygen gas from plagioclase

I would like to know if there is a possibility to decompose plagioclase to obtain oxygen gas to be used in a combustion reaction? I know that oxygen represents $47\%$ of the weight of 1 mole of ...
1
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2answers
2k views

Using bleach and water to shine pebbles

I soaked a large jar full of pebbles (from a river) in bleach water for a couple of years and the rocks came out super smooth and shiny when dried. I have tried to repeat this process again but am not ...
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2answers
101 views

Finding/Calculating Thermal Conductivity of Magnesite

Our research group is having a very difficult time locating anything about the thermal conductivity of $\ce{MgCO3}$. It is a pretty commonly mineral, so we were pretty surprised by this. Is any way to ...
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0answers
43 views

Is awaruite to nickel sulfate possible?

Much time has passed since my basic chemistry and I am trying to determine if an awaruite mine proposed by FPX Nickel Corp ("FPX") might serve as feed-stock to nickel sulfate for battery production. ...
1
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0answers
36 views

What does this chemical formula mean?

Wikipedia says the formula of aluminum oxynitride is this $\ce{(AlN)_x·(Al2O3)_{1−x}}$, $0.30 \leq x \leq 0.37$ . What does this formula mean?
1
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0answers
474 views

Hydrates and melting points

Basalt melting point: wet vs dry I had a student ask me this in class the other day; I thought about it, but I still can't work it out. Many mineral and rock hydrates (take basalt, for instance) ...
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0answers
50 views

What do you get when you melt and solidify sand?

Would you get something brittle like glass or something like granite?
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0answers
45 views

What needs to happen to this: Ca5(PO4)3Cl to get this: CaCl2?

$\ce{Ca5(PO4)3Cl}$ is a mineral called Chlorapatite So lets say I have some chlorapatite in my garage, what do I need to do to it so that I am left with Calcium Chloride $\ce{CaCl2}$?
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1answer
651 views

Does salt dissolve in fat when heated? [closed]

As the question states, does salt dissolve in fat when heated. If no how can we get it to dissolve in fat and distribute through the fat like it does with water?
-1
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1answer
290 views

What are things that impact a mineral's color, clarity, hardness? [closed]

I don't know what else to write here because my question is the title. Please help.
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1answer
29 views

How can I reduce sodium chloride levels in water, without removing other minerals?

How can I reduce sodium chloride levels in water, without removing other minerals? Good day, I make a sole from Himalayan Salt which I add to my Reverse Osmosis treated water to ensure my body isn't ...
-3
votes
1answer
62 views

Can I grow chlorapatite crystals at home?

Can I grow chlorapatite crystals, $\ce{Ca10(PO4)6(Cl)2}$, at home? Is it as simple as ordering the elements online and throwing them into a beaker, and warming it up maybe?