OMG! Sand people, check this out!
- Thread starter Gr8KarmaSF
- Start date
is300zx;1710609; said:
Gr8KarmaSF;1710616; said:
why not? the underside lined with cloth is still good and all I did was brush the little mags off.
I think is300 is concerned about "metal shards"...It is nothing more than dust though...They look like "shards" because they line up at their poles....They can be easily wiped off of a mag float
Gr8KarmaSF;1710144; said:So I dropped my cleaning magnet into my sand and look what I pulled out!!! All these little metal fragments from my pool filter sand.
Can other people please do this and share if they get the same results?
Luckily it doesnt seem to have effected my fish, but Ive dragged the magnet through the sand over and over again in hopes of getting it all.
My only worry is that it did effect my fish in the long term, even though I cant see anything from it now...
I wonder if all pool filter sand is made equally? This is why I am asking people to do the same!
It would be great if we could figure out which brands have these shards and which dont!!! Unfortunately I dont remember what brand I used!!!
the gravel i have has some grains high in iron....they stick......i would guess this is very common
a la bigspizz
Magnetite
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Magnetite is not to be confused with Magnesite or Maghemite. Magnetite
Magnetite from the Kola Peninsula, Russia
General Category Mineral Chemical formula iron(II,III) oxide, Fe3O4 Identification Color Black, greyish Crystal habit Octahedral, fine granular to massive Crystal system Isometric Cleavage Indistinct Fracture Uneven Mohs Scale hardness 5.5–6.5 Luster Metallic Refractive index Opaque Streak Black Specific gravity 5.17–5.18 Major varieties Lodestone Magnetic with definite north and south poles Magnetite is a ferrimagnetic mineral with chemical formula Fe3O4, one of several iron oxides and a member of the spinel group. The chemical IUPAC name is iron(II,III) oxide and the common chemical name ferrous-ferric oxide. The formula for magnetite may also be written as FeO·Fe2O3, which is one part wüstite (FeO) and one part hematite (Fe2O3). This refers to the different oxidation states of the iron in one structure, not a solid solution.The Curie temperature of magnetite is 858 K. Magnetite is the most magnetic of all the naturally occurring minerals on Earth, and these magnetic properties led to lodestone being used as an early form of magnetic compass. Magnetite typically carries the dominant magnetic signature in rocks, and so it has been a critical tool in paleomagnetism, a science important in discovering and understanding plate tectonics. The relationships between magnetite and other iron-rich oxide minerals such as ilmenite, hematite, and ulvospinel have been much studied, as the complicated reactions between these minerals and oxygen influence how and when magnetite preserves records of the Earth's magnetic field.
Magnetite has been very important in understanding the conditions under which rocks form and evolve. Magnetite reacts with oxygen to produce hematite, and the mineral pair forms a buffer that can control oxygen fugacity. Commonly igneous rocks contain grains of two solid solutions, one between magnetite and ulvospinel and the other between ilmenite and hematite. Compositions of the mineral pairs are used to calculate how oxidizing was the magma (i.e., the oxygen fugacity of the magma): a range of oxidizing conditions are found in magmas and the oxidation state helps to determine how the magmas might evolve by fractional crystallization.
Small grains of magnetite occur in almost all igneous rocks and metamorphic rocks. Magnetite also occurs in many sedimentary rocks, including banded iron formations. In many igneous rocks, magnetite-rich and ilmenite-rich grains occur that precipitated together from magma. Magnetite also is produced from peridotites and dunites by serpentinization.
Magnetite is a valuable source of iron ore. It dissolves slowly in hydrochloric acid.
Contents
[hide]
- 1 Distribution of deposits
- 2 Biological occurrences
- 3 Preparation as a ferrofluid
- 4 See also
- 5 References
Magnetite is sometimes found in large quantities in beach sand. Such mineral sands or iron sands or black sands are found in various places such as California and the west coast of New Zealand. The magnetite is carried to the beach via rivers from erosion and is concentrated via wave action and currents.
Huge deposits have been found in banded iron formations. These sedimentary rocks have been used to infer changes in the oxygen content of the atmosphere of the Earth.
Large deposits of Magnetite also are found in Kiruna, Sweden, the Pilbara region in Western Australia, and in the Adirondack region of New York in the United States. Deposits are also found in Norway, Germany, Italy, Switzerland, South Africa, India, Mexico, and in Oregon, New Jersey, Pennsylvania, North Carolina, Virginia, New Mexico, Utah, and Colorado in the United States. Recently, in June 2005, an exploration company, Cardero Resources, discovered a vast deposit of magnetite-bearing sand dunes in Peru. The dune field covers 250 square kilometers (100 sq mi), with the highest dune at over 2,000 meters (6,560 ft) above the desert floor. The sand contains 10% magnetite[1].
[edit] Biological occurrences
Crystals of magnetite have been found in some bacteria (e.g., Magnetospirillum magnetotacticum) and in the brains of bees, of termites, of some birds (e.g., the pigeon), and of humans. These crystals are thought to be involved in magnetoreception, the ability to sense the polarity or the inclination of the Earth's magnetic field, and to be involved in navigation. Also, chitons have teeth made of magnetite on their radula making them unique among animals. This means they have an exceptionally abrasive tongue with which to scrape food from rocks.
The study of biomagnetism began with the discoveries of Caltech paleoecologist Heinz Lowenstam in the 1960s.
[edit] Preparation as a ferrofluid
Magnetite can be prepared in the laboratory as a ferrofluid in the Massart method by mixing iron(II) chloride and iron(III) chloride in the presence of sodium hydroxide.
Dr. J - The mags are fine and sand like, would the shape and structure be different if it was equipment failure during processing and packaging? My guess would be that the size of the mags would be inconsistent. Anybody agree? Disagree? How could one tell and if it was an equipment failure/processing issue would the resulting mag particles have a different if not negative effect on the fish/water?
john - thanks for sharing!!!
john - thanks for sharing!!!
i often rember seeing black specs in sandy places where water has run...the heavier particles settle out like in a gold mine sluice box.
in general it seems this magnetically attached material is everywhere.
in general it seems this magnetically attached material is everywhere.
