Troilite
Troilite is a rare iron sulfide mineral with the simple formula of FeS. It is the iron rich endmember of the pyrrhotite group. Pyrrhotite has the formula Fe(1-x)S (x = 0 to 0.2) which is iron deficient. As troilite lacks the iron deficiency which gives pyrrhotite its characteristic magnetism, troilite is non-magnetic.
Troilite can be found as a native mineral on Earth, but is more abundant in meteorites, in particular those originating from the Moon and Mars. It is among the minerals found in samples of the meteorite that struck Russia on February 15th, 2013. Uniform presence of troilite on the Moon and possibly on Mars has been confirmed by the Apollo, Viking and Phobos space probes. The relative intensities of isotopes of sulfur are rather constant in meteorites as compared to the Earth minerals, and therefore troilite from Canyon Diablo meteorite is chosen as the international sulfur isotope ratio standard.
Structure
Troilite has hexagonal structure (Pearson symbol hP24, Space group P-62c No 190). Its unit cell is approximately a combination of two vertically stacked basic NiAs-type cells of pyrrhotite, where the top cell is diagonally shifted. For this reason, troilite is sometimes called pyrrhotite-2C.
Podcasts:
-
by Derailed
In My Dreams
by: DerailedWhen we all die and judgment day comes there will be two places we go; Heaven or Hell and I know it’s not up to me to tell who will get eternal glory and who will be left in the mud.
But what I know is wile I’m here I will make my dreams come true, and to make a better place for you and me.
Some people get all mad and tell me that dreams are bad,
But I’m not going to just stick my head in the sand I’m not going to join that corporate band,
I’m going to lie here in bed dreaming.
And it’s not like they can do any thing, I’m unstoppable in my dreams.
No dream is too big you can do it all the time in you’re mind.
I am an ice cream man,
I play in my one school band,
I live in a far off land of happiness,
The beaches are covered with bateafule sand,
And life is good,
And every thing is as it should be.
In my dreams.
What’s the point of waiting just dive in and go.
When we all die and judgment day comes there will be two places we go; Heaven or Hell and I know it’s not up to me to tell who will get eternal glory and who will be left in the mud.
But what I know is wile I’m here I will make my dreams come true.