[permalink] [id link]
Molybdenum minerals have been known into prehistory, but the element was " discovered " ( in the sense of differentiating it as a new entity from the mineral salts of other metals ) in 1778 by Carl Wilhelm Scheele.
from
Wikipedia
Some Related Sentences
Molybdenum and minerals
Molybdenum does not occur naturally as a free metal on Earth, but rather in various oxidation states in minerals.
Category: Molybdenum minerals
Molybdenum and have
Molybdenum isotopes with mass numbers from 111 to 117 all have half-lives of approximately 150 ns.
" Nonetheless, many studies have identified other uses and nutritional benefits from other micronutrients that exist at these sites, including Selenium ( Se ), Cobalt ( Co ) and / or Molybdenum ( Mo ).
Molybdenum isotopes with mass numbers 111 and up all have half-lives of approximately. 15 μs.
Molybdenum and into
Molybdenum is used by plants to reduce nitrates into usable forms.
Molybdenum and element
Molybdenum ( or ), is a Group 6 chemical element with the symbol Mo and atomic number 42.
* Molybdenum, a chemical element with the symbol Mo
Molybdenum and discovered
* Molybdenum discovered by Carl Wilhelm Scheele.
Molybdenum and from
* Molybdenum – from copper extraction
Molybdenum and .
Non-liquid lubricants include grease, powders ( dry graphite, PTFE, Molybdenum disulfide, tungsten disulfide, etc.
Other materials with similar magnetic properties include Co-Netic, supermalloy, supermumetal, nilomag, sanbold, Molybdenum permalloy, Sendust, M-1040, Hipernom, HyMu-80 and Amumetal.
Nickel and Molybdenum are typically also found in stainless steels.
Molybdenum oxide, MoO < sub > 3 </ sub >, also reacts with moisture to form a hydroxide MoO < sub > 2 </ sub >( OH )< sub > 2 </ sub >, so SgO < sub > 2 </ sub >( OH )< sub > 2 </ sub > is also feasible.
Molybdenum deposits in the CMB are of continuing interest.
Molybdenum is added on the order of 0. 3 to 1 % to increase chill and refine the graphite and pearlite structure ; it is often added in conjunction with nickel, copper, and chromium to form high strength irons.
A subsidiary of Phelps Dodge Corporation, Climax Molybdenum, is the largest primary producer of molybdenum in the world.
At the Henderson mine west of Empire, Colorado, Climax Molybdenum has produced more than 160 million tons of ore and 770 million pounds of molybdenum since the mine opened in 1976.
Climax Molybdenum also owns the inactive Climax molybdenum mine, north of Leadville, Colorado.
Molybdenum is a cofactor to enzymes important in building amino acids.
Molybdenum alloy with a gold plating is frequently used.
* PD Press Release ( April 5, 2006 ) Phelps Dodge Board of Directors Conditionally Approves Restart of Climax Molybdenum Mine near Leadville, Colo.
Molybdenum Permalloy is an alloy of 81 % nickel, 17 % iron and 2 % molybdenum.
A chart for a scan of a Molybdenum specimen is shown in Fig.
Molybdenum is essential to plant health.
* Molybdenum disilicide ( MoSi < sub > 2 </ sub >, molybdenum silicide ), an intermetallic compound, a silicide of molybdenum, is a refractory ceramic with primary use in heating elements.
* Molybdenum disilicide doped with Al or Mo ( Si, Al )< sub > 2 </ sub >, an intermetallic compound and a silicide of molybdenum, is a refractory ceramic with primary use in heating elements.
Molybdenum, vanadium, tantalum, niobium, manganese, iron, chromium, cobalt, nickel, copper and silicon are beta stabilizers.
minerals and have
For example, there are persons who are in physical science, in the field of mineralogy, trained in crystallography, who use only X-rays, applying only the powder technique of X-ray diffraction, to clay minerals only, and who have spent the last fifteen years concentrating on the montmorillonites ; ;
Calcium, phosphorus and iron are present in worthwhile amounts, and eleven other minerals also have been found in varying trace amounts.
In the 1st century BC the Greek Dioscorides seems to have recognised a link between zinc minerals and brass describing how Cadmia ( zinc oxide ) was found on the walls of furnaces used to heat either zinc ore or copper and explaining that it can then be used to make brass.
The fabric of these crucibles is porous, probably designed to prevent a build up of pressure, and many have small holes in the lids which may be designed to release pressure or to add additional zinc minerals near the end of the process.
While all of the 98 naturally occurring elements have been identified in mineral samples from the Earth's crust, only a small minority of elements are found as recognizable, relative pure minerals.
These electronegative elements are strongly associated with metal-bearing minerals, where they have formed water-insoluble compounds with the metals in the ores.
Other minerals have been proposed which would fit the observations.
The transport ( and smuggling ) of minerals with a high value for weight is also carried out by air, and in the east, some stretches of paved road isolated by destroyed bridges or impassable sections have been turned into airstrips.
To Medieval thinking, all things were connected with each other — a mode of thought that finds its traces today in the occult sciences or esoteric thought — ranging from astrology to believing certain minerals have certain beneficiary effects.
Soils which are rich in clay minerals tend to have lower decomposition rates, and thus, higher levels of organic matter.
Poor intake of various vitamins and minerals can lead to diseases that can have far-reaching effects on health.
Ever since recorded history began, and probably before, people have noticed and gathered fossils, including pieces of rock and minerals that have replaced the remains of biologic organisms, or preserved their external form.
Gemstones, minerals, may have a distinctive fluorescence or may fluoresce differently under short-wave ultraviolet, long-wave ultraviolet, or X-rays.
Most gemstones are hard, but some soft minerals are used in jewelry because of their luster or other physical properties that have aesthetic value.
Gabbro is usually equigranular in texture, although it may be porphyritic at times, especially when plagioclase oikocrysts have grown earlier than the groundmass minerals.
Concentrations of non-metalliferous minerals that have been commercially exploited include kaolin clay, feldspar, quartz, beryl and graphite.
The master horizon, E, is used for subsurface horizons that have a significant loss of minerals ( eluviation ).
NASA research has shown that aeroponically grown plants have an 80 % increase in dry weight biomass ( essential minerals ) compared to hydroponically grown plants.
Most molybdenum compounds have low solubility in water, but the molybdate ion MoO < sub > 4 </ sub >< sup > 2 −</ sup > is soluble and forms when molybdenum-containing minerals are in contact with oxygen and water.
It is different from a rock, which can be an aggregate of minerals or non-minerals, and does not have a specific chemical composition.
All silicate minerals have a base unit of a < sup > 4 -</ sup > silica tetrahedra — that is, a silicon cation coordinated by four oxygen anions, which gives the shape of a tetrahedron.
There have been several recent proposals to amend the definition to consider biogenic or amorphous substances as minerals.
By definition, minerals have a characteristic atomic arrangement.
0.169 seconds.