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New Mexico Geological Society

NEW MEXICO GEOLOGICAL SOCIETY TWELFTH FIELD CONFERENCE Check Lists of Minerals for Mining Districts and Other Localities Near Albuquerque STUART A. NORTHROP University of New Mexico Most of these records of occurrence are taken from the Magnetite Quartz writers ( 1959) "Minerals of New Mexico." Mineral oc- Microcline Si!limonite

Pyrite Mineral | Uses and Properties

Pyrite and Coal Mining. Sulfur occurs in coal in three different forms: 1) organic sulfur, 2) sulfate minerals, and 3) sulfide minerals (mostly pyrite with minor amounts of marcasite). When the coal is burned, these forms of sulfur are converted into sulfur dioxide gas and contribute to air pollution and acid rain unless they are removed from the emissions.

Marcasite | mineral | Britannica.com

Marcasite is found with lead and zinc minerals in metalliferous veins, as at Galena, Ill., U.S., and at Clausthal Zellerfeld and Linnich, Ger. Marcasite, which has the same chemical formula as pyrite (FeS 2) but crystallizes in the orthorhombic instead of the isometric system, alters upon weathering to ferrous sulfate and sulfuric acid.

Marcasite FeS2 - RRUFF

Marcasite FeS2 c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Orthorhombic. Point Group: 2/m 2/m 2/m. Crystals typically tabular on {010}, also pyramidal, prismatic, and, rarely, capillary; curved faces common.

Pyrite - Wikipedia

Pyrite and marcasite commonly occur as replacement pseudomorphs after fossils in black shale and other sedimentary rocks formed under reducing environmental conditions. However, pyrite dollars or pyrite suns which have an appearance similar to sand dollars are pseudofossils and lack the pentagonal symmetry of the animal.

Pyrite, Marcasite – The Collector's Edge

Very nice large "floater" group of spear-like pyrite and marcasite crystals with good luster from Chillicothe, Ross Co., Ohio, USA. An excellent large pyrite/marcasite for this classic midwestern US locality. Ex. Proctor Family Trust Collection.

Marcasite (Iron Sulfide) - Ohio History Central

The name marcasite comes from a French word whose origin is unclear. This mineral has the same chemical makeup as pyrite but its crystal structure is different. The term marcasite sometimes is used for small pieces of polished and faceted pieces of jewelry, which actually are made of pyrite. Marcasite itself is not used as a gem.

DivinityCrystals.com - Marcasite - Sterling Silver ...

New with tags: A brand-new, unused, and unworn item in the original packaging (such as the original box or bag) and/or with the original tags attached. ...

Petrographic characterization of Kentucky coals. Final ...

A classification system was developed to provide a consistent method for recording different pyrite/marcasite types. Sulfides were microscopically measured and placed in one of six size divisions (<5, 5 to 10, 10 to 40, 40 to 75, 75 to 100, or >150..mu..m) rather than absolute size.

Evaluating structure selection in the hydrothermal growth ...

@article{osti_1413713, title = {Evaluating structure selection in the hydrothermal growth of FeS2 pyrite and marcasite}, author = {Kitchaev, Daniil A. and Ceder, Gerbrand}, abstractNote = {While the ab initio prediction of the properties of solids and their optimization towards new proposed materials is becoming established, little predictive theory exists as to which metastable materials can ...

marcasite - Wiktionary

(jewellery) Pyrite. Any of various metal sulfides, usually iron sulfide minerals. [from 15th c.] 1999, Nicholas Goodrick-Clarke, translating Paracelsus, Opus Paramirum, in Essential Readings, North Atlantic Books 1999, p. 95: If he wants to speak as a physician, however, he must say, this marcasite is the man's disease, hence it will cure him.

On pyrite and marcasite (eBook, 1901) [WorldCat.org]

Note: Citations are based on reference standards. However, formatting rules can vary widely between applications and fields of interest or study. The specific requirements or preferences of your reviewing publisher, classroom teacher, institution or organization should be applied.

An examination of marcasite and pyrite oxidative ...

Title An examination of marcasite and pyrite oxidative/dissolution rates in seawater Aggregation USF Electronic Theses and Dissertations Format Book. rights and access. N/A. related resources. N/A. An examination of marcasite and pyrite oxidative/dissolution rates in seawater < back to collection.

Replacement of pyrrhotite by pyrite and marcasite under ...

S(-II)-deficient solutions (saturation index << 1000), while pyrite was the main product at saturation indices >1000. Different textures were obtained for the replacement of pyrrhotite by either pyrite or marcasite. Pyrite formation proceeded by direct replacement of pyrrhotite and, simultaneously, by overgrowth from solution.

Mahoney-Aggregates Containing Pyrrhotite - NESMEA

Products of Iron Sulfide oxidation in Concrete •When iron sulfides oxidize it produces iron oxides and sulfuric acid •Iron oxides occupy more space than original molecules •Sulfuric acid attacks the concrete paste weakening it and it forms secondary expansive minerals such as ettringite •Bottom line: the concrete is weakened with internal stresses

On pyrite and marcasite (Book, 1901) [WorldCat.org]

On pyrite and marcasite. [H N Stokes; Geological Survey (U.S.)] Home. WorldCat Home About WorldCat Help. Search. Search for Library Items Search for Lists Search for ... At head of title: United States Geological Survey. As of 07/14/2015, GPO could not validate the distribution status of this title …

Pyrite FeS2 - Handbook of Mineralogy

Pyrite FeS2 c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Cubic. Point Group: 2/m 3. Typically cubic, pyritohedral, octahedral, and combinations of these and other forms, to 25 cm or more. Striated conforming to pyritohedral symmetry; may be elongated to acicular. Commonly granular, globular, framboidal, stalactitic.

MARCASITE (Iron Sulfide) - Amethyst Galleries

The marcasite/pyrite polymorh pair is probably the most famous polymorph pair next to the diamond/graphite pair. Adding to the confusion between marcasite and pyrite is the use of the word marcasite as a jewelry trade name. The term is applied to small polished and faceted stones that are inlayed in sterling silver.

Details - A Comparative Study of the Chemical Behavior of ...

title = {A Comparative Study of the Chemical Behavior of Pyrite and Marcasite}, journal = {Proceedings of the American Philosophical Society held at Philadelphia for promoting useful knowledge.}, volume = {33}, copyright = {Public domain. The BHL considers that this work is …

Evaluating structure selection in the hydrothermal growth ...

Evaluating structure selection in the hydrothermal growth of FeS2 pyrite and marcasite @inproceedings{Kitchaev2016EvaluatingSS, title={Evaluating structure selection in the hydrothermal growth of FeS2 pyrite and marcasite}, author={Daniil A Kitchaev and Gerbrand Ceder}, booktitle={Nature communications}, year={2016} }

Mighty Minerals Project List of Common Minerals

Pyrite (Marcasite) 32. Quartz 33. Serpentine 34. Silver 35. Sphalerite 36. Sulfur 37. Talc (Soapstone) 38. Tungsten 39. Turquoise 40. Zinc Mighty Minerals Project List of Common Minerals. Title: Thanks! Author: Tracy Trimpe Created Date:

Heavy minerals and sedimentary organic matter in ...

Pyrite generally was found in association with lignite or as interstitial cement. Marcasite was found as interstitial cement and is associated with the oxidation of iron-sulfide minerals upgradient. Pyrite crystals were octahedral, cubic, cubo-octahedral, and framboidal, and many samples showed more than one generation of crystal growth.

File:Pyrite-marcasite concretions in carbonaceous shale ...

Texturally, the concretions have outward-radiating crystals with moderately-developed concentricity. Mineralogically, they are principally composed of pyrite, plus minor marcasite (also FeS2 - iron sulfide; marcasite is a polymorph of pyrite). Locality: coal mine in Randolph County, southwestern Illinois, USA

Distribution and origin of sulfur in Colorado oil shale ...

The vertical distribution of sulfur through the oil shale is cyclic. As many as 25 sulfur cycles have lateral continuity and can be traced between the core holes. Most of the sulfur resides in iron sulfides (pyrite, marcasite, and minor. pyrrhotite), and small amounts are organically bound in kerogen.

Minerals List | David K. Joyce

A large mound of lustrous, iron-tinted, pearly, curved dolomite crystals with many bladed pyrite crystals embedded in the bottom. The dolomite crystals are sprinkled with 2mm, or so, pyrite crystals. Many of the pyrite crystals have marcasite crystals formed on them in oriented overgrowth.

Pyrite - New World Encyclopedia

Pyrite is often used in jewelry such as necklaces and bracelets. Its polymorph marcasite, although similar, cannot be used in jewelry as it has a tendency to crumble into powder. Adding to the confusion between marcasite and pyrite is the use of the word "marcasite" as a jewelry trade name.

Marcasite and Pyrite - GemSelect

Marcasite and Pyrite. A mineral is defined both by its chemical composition and its crystal structure. In some cases two different minerals have the same chemical composition, but different crystal structures. Known as polymorphs, these intriguing cases illustrate how the different crystal structures can result in quite different physical ...

The interaction of cyanide with pyrite, marcasite and ...

of pyrite, marcasite and pyrrhotite through optimization test of various faces are (100), (101), and (001), respectively. All surfaces were obtained from the optimum unit cell volume of the bulk sulphides. The pyrite (100), marcasite (101), and pyr- ... Title: The interaction of cyanide with pyrite, marcasite …