Please do NOT send us photo's which don't belong to you. Any photo's copied from Google Images will be removed. How often can you mix chemistry with geology? Simply place the inch rock in a bowl of vinegar and watch the popcorn-like aragonite crystals grow over the next weeks.
Our popcorn rock in the photo shows 10 days of crystal growth. No, you can't eat it - it's rock, silly. I was so pleased, I bought two. Download the list and start making creative family memories today! Name Email send me the family fall activity poster! Thanks so much, Anne. Maybe this will help it become one of the popular kids in the crystal world! I have never herd of aragonite crystals! These are incredible!
Off to order some dolomite rocks STAT! Thank you for such an awesome science experiment. I was wondering if adding color would ruin the experiment or if it was not recommended. Thanks so much! I was thinking the same thing. Try putting the vinegar in the jar without the rock. Putting the vinegar in with a rock or anything else might allow the acetic acid to form compounds like calcium acetate that can also produce different crystals.
Acetic acid is a compound of carbon, hydrogen, and oxygen. Aragonite is a compound of calcium, carbon, and oxygen. If aragonite was being produced by a reaction of the acetic acid with calcium in the dolomite, a lot of hydrogen would be being released.
Those jars show no signs of bubbles or any other evidence of hydrogen precipitating out of the fluid, so there is no way this can be producing aragonite. For us, it took a little over two weeks to start seeing our Aragonite crystals. Repeated twinning results in pseudo-hexagonal forms. Aragonite may be columnar or fibrous, occasionally in branching stalactitic forms. The rocks contained in this package are magnesium rich dolomite.
Dolomite is an evaporative sedimentary rock made up of a variety of sediments and minerals. This dolomite is actually somewhat unique in that it possesses an amazing property that is not necessarily common to other dolomite samples.
When placed in distilled white vinegar, this dolomite grows beautiful white aragonite crystals. This characteristic was first discovered in by Mr.
Richard D. Barnes, then a geology student at the University of Utah, who was working with fossil specimens of horn coral that he had collected. Typically, horn corals are preserved in limestone, a rock that is composed of calcium carbonate, which reacts with vinegar and dissolves in that weak acid so that the fossil can be removed and studied. The interesting thing about this rock is that is did not dissolve but rather produced spectacular, white, bulbous crystals, resembling popped kernels of corn.
That is how these rocks came to have the commercial name, popcorn rocks. In going back to the site, Mr. How to Clean Quartz Crystals. How to Make Crystals Out of Salt. How to Make Salt Crystals at Home. Rock Candy Science Project. Smithsonian Crystal Growing Kit Directions. How to Clean Geodes. How Does a Sugar Crystal Grow? Purpose of Growing Crystals.
0コメント