About site: earth sciences/geology/rocks and minerals - Perlite

About site: http://www.perlite.net/

Title: earth sciences/geology/rocks and minerals - Perlite Pictures, links, and a brief description of the properties and applications of this siliceous rock.

Rakovan,_John Professor in the Department of Geology at Miami University, Oxford, OH. Includes information on Dr. Rakovan's research and teaching in mineralogy and geochemistry.

The_Rock_Gallery Geological display of images and information including crystals, minerals and gems.

The_Rock,_Mineral,_and_Fossil_Reference Contains over 100 pictures of minerals, rocks and fossils, as well as information about classification, identification, the Science Olympiad Rocks and Minerals event and related topics.

Salt_(MRBloch_Archive) A collection of material relating to salt [NaCl] and its influence on civilization. Includes sections on physiology, geology, archeology, palaeoclimatology, palaeogeography, production, religion, ec

YupRocks high-resolution pictures of rocks and minerals, taken from personal collections, as well as the Calvin College Geology Department, Michigan, USA.

Fear-No-More_Zoo_of_Adidam Inspired by the Wisdom-Teaching of Avatar Adi Da Samraj, Fear-No-More Zoo gives us an opportunity to appreciate animals in their natural state of Contemplation. The way the animals are related to awa

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International_Species_Information_System Use abstracts to find the holdings of zoos and other institutions of many wild species, including amphibians, birds, fishes, mammals and reptiles.

Sara\'s_Zoo_Keeper_Page Sara raises the baby cats at the Nashville zoo. Many pictures and information about zoo keeping, becoming a zoo keeper, training and education.

theBigZoo_com World news about animals, zoos and conservation, virtual zoo with photos and descriptions of animals, and online games.

Zoo_Outreach_Organisation A conservation, education, research and animal welfare society covering South Asia and India. Includes overview of zoos in the region, database of detailed animal information, research and conservatio

ZooLex_Zoo_Design_Organization Zoo professionals present online animal exhibits. Compares standardized descriptions of animal exhibits and contains a list of firms/products/services/technologies for zoo design and construction.

AIP_Education_and_Employment_Statistics The latest data regarding education and employment trends in physics and related science fields.

AIP_Employment_and_Industry American Institute of Physics career network for physics, engineering and related physical sciences.

APS_Careers_in_Physics The American Physical Society Jobs/careers page.

Careers_with_Physics Advice and resources from the UK Institute of Physics.

CERN_jobs_portal Human resources portal for CERN, the world's largest particle physics laboratory. (this replaces a broken link in the current category list)

High-energy_physics_jobs Search a High-energy Physics employment database maintained by the Stanford Linear Accelerator Center.

Job_Openings_at_the_European_Patent_Office_(EPO) The EPO is an international authority whose task is to examine and grant patents on behalf of its 20 member states.

Jobs_in_Physics,_Astronomy_and_Other_Fields Links to career planning and job hunting information as well as to listings of available positions.

Physics_&_Astronomy_REU_reviews Student-written reviews of REUs and other summer undergraduate research programs & jobs, plus answers to FAQs and useful related links

Physics_and_Astronomy_Job_Openings Search a database kept by the Chronicle of Higher Education.

PhysicsJobs_com Job site for Physics Professionals. Fee required to post vacancies.

Physicsweb_org Listings of physics openings for all degree levels.

Physlink_-_Physics,_Astronomy_and_Engineering_Jobs Job openings for physicists, engineers, scientists. Post and read job listings and follow links to various science employment sites.

Science_careers_database Search a database of jobs maintained by Science magazine.

Spieworks Maintained by the International Society for Optical Engineering. Includes job listings for related science and engineering posts, with a search function, as well as a list of conferences and some tip

TIPTOP_Jobs_On-Line Bulletin-board for posting, searching, and finding physics job openings.

Allexperts_Meteorology_Q&A Experts ranked by knowledge or prestige offer answers to questions in their areas of specialization.

American_Meteorological_Society Promotes the development, dissemination, information and education on the atmospheric and related oceanic and hydrologic sciences. About the organization, publications, education programs, policy iss

Artificial_Intelligence_and_Meteorology Collection of links to web resources related to the applications of artificial intelligence to the field of weather forecasting.

AWS_Inc_ Sponsors school WeatherNet, StormDisplay, InstaCam and WeatherBug. Includes product details, news, events and employment information.

Citizen_Weather_Observer_Program A private/public partnership which collects weather data from individuals and makes it available to weather services. Site has information about setting up a station and joining the program, and acces

The_Danish_Weathercenter Climate information for Denmark and Northern Europe. Includes forecast charts, satellite photos and observations.

Freese-Notis_Weather_-_Worldwide_Meteorology Source of weather information for agriculture, aviation, commodities, construction, energy, forensics, and transportation. NEXRAD radar imagery via InterRAD.

Fremont\'s_Contribution_to_Meteorology Fremont's 1848 description of the forces that govern the weather of California.

LWXI_Community_Forums Live Weather Images community forums message board with chat topics primarily about meteorology and current weather events as well as discussion about atmospheric physics, dynamics and modeling.

Meteorological_and_Climatologial_Resources Comprehensive links to world-wide weather and climate information, as well as journals, newsgroups, job opportunities, software, and imagery.

PlanetDiary Highlights natural phenomena and current events from around the world.

Portsmouth_Weather_Records_Service Local weather data, forecasts, summaries on the web since 1995 in Portsmouth, Virginia. The service was established in 1976 and maintains an archived weather database.

Resources_in_Atmospheric_Sciences An educational tool comprised of short articles on the subject and a comprehensive collection of links to outside weather sources.

RMS_Forecasting_Services A wide variety of meteorological consulting services; forensic meteorology, expert testimony, forecasting, training, site surveys and instrumentation, fire weather, and applied meteorological and clim

Scott\'s_Weather_Page General information on severe weather, current conditions, radar, satellite and other topics including a detailed forecast for the Detroit Metro Area.

UM_Weather From the University of Michigan at Ann Arbor. Includes forecasts, maps, models, radar and satellite images, weather cams and a collection of weather-related links.

Weather_and_Climate_Resources From the Institute of Global Environment and Society. Includes links to maps, analyses, climate data and satellite images.

Weather_Legacy Meteorology information including glossary, definition of meteorological scales, software, poetry, and links.

Weber\'s_Weather_World Forecast and precipitation links, with imagery links to climate date, hurricane information, lightning strikes, satellite photos and the National Weather Service.

This is sites2007.com cache of m/ as retrieved on 2009.01.08 sites2007.com's cache is the snapshot that we took of the page as we crawled the web. The page may have changed since that time.

www.perlite.net

www.perlite.org - The Perlite Institute Web Site minerals.usgs.gov - USGS Minerals Information on Perlite www.perlite.net/redco - Redco II's web site - Perlite on the West Coast www.perlite.net/apc - American Perlite's web site - Perlite ore www.schundler.com - The Schundler Company's web site - Perlite on the East Coast www.whittemoreco.com - Whittemore Company's web site - Perlite on the East Coast www.perlite.com - Supreme Perlite Company's web site - Perlite in the Northwest www.silbrico.com - Silbrico's Web site - Perlite in the Mid West www.incon-corp.com - Incon Corporation's web site - Perlite furnace systems and info www.otavi.de - Otavi Minen AG - Perlite in Europe www.perlite.de - Deutsche Perlite GmbH - Perlite in Germany and Europe www.perlite.dk - Nordisk Perlite - Perlite in Norway and Europe www.europerl.com - Stauss Perlite and Europerl - Perlite in Austria www.pertas.net - Per&Tas Metal and Perlite Inc. - Perlite in Turkey www.pullrhenen.nl - Pull b.v. - - Perlite in The Netherlands and Europe www.usasia-pacific.com - US Asia-Pacific Minerals - Perlite in the Pacific Rim and Asia

Welcome to the home page of www.perlite.net! Here you will find information about what perlite is and its many and varied applications. Additionally, you can find links to other perlite resources on the Internet on the left. www.perlite.net is owned by Redco II , a leader in the perlite industry based in North Hollywood, California. Redco is part of a vertically integrated group of companies. This includes American Perlite Company which mines crude perlite ore from its source in the Sierra Nevada Mountains. You can find out more information about perlite by clicking on the respective links of the various perlite resources listed at the left of this page. These web pages are living documents, subject to change over time. Please check back often! You can e-mail us with questions at info@perlite.net
Basic facts about perlite
Perlite is not a trade name but a generic term for naturally occurring siliceous rock. The distinguishing feature which sets perlite apart from other volcanic glasses is that when heated to a suitable point in its softening range, it expands from four to twenty times its original volume. This expansion is due to the presence of two to six percent combined water in the crude perlite rock. When quickly heated to above 1600�F (871�C), the crude rock pops in a manner similar to popcorn as the combined water vaporizes and creates countless tiny bubbles which account for the amazing light weight and other exceptional physical properties of expanded perlite. This expansion process also creates one of perlite's most distinguishing characteristics: its white color. While the crude rock may range from transparent light gray to glossy black, the color of expanded perlite ranges from snowy white to grayish white. Expanded perlite can be manufactured to weigh as little as 2 pounds per cubic foot making it adaptable for numerous applications. Since perlite is a form of natural glass, it is classified as chemically inert and has a pH of approximately 7. Perlite is mined and expanded all over the world. The United States is estimated to be the largest consumer and producer of crude and expanded perlite. However, there is very strong world wide production and consumption of perlite. Other leading countries producing perlite include China, Greece, Japan, Hungary, Armenia, Italy, Mexico, Philippines, and Turkey. Typical Elemental Analysis Silicon 33.8 Aluminum 7.2 Potassium 3.5 Sodium 3.4 Iron 0.6 Calcium 0.6 Magnesium 0.2 Trace 0.2 Oxygen (by difference) 47.5 Net Total 97.0 Bound Water 3.0 Total 100.0 * All analyses are shown in elemental form even though the actual forms present are mixed glassy silicates. Free silica may be present in small amounts, characteristic of the particular ore body. More specific information may be obtained from the ore supplier involved. Typical Physical Properties Color White Refractive Index 1.5 Free Moisture, Maximum 0.5% pH (of water slurry) 6.5 - 8.0 Specific Gravity 2.2 - 2.4 Bulk Density (loose weight) As desired but usually in the 2-25 lb/ft3 range (32-400 kg/m3) Mesh Size Available As desired, 4-8 mesh and finer Softening Point 1600-2000�F (871-1093�C) Fusion Point 2300-2450�F (1260-1343�C) Specific Heat 0.2 Btu/lb��F (387 J/kg�K) Thermal Conductivity at 75�F (24�C) .27-.41 Btu�in/h�ft2��F(.04-.06 W/m�K) Solubility .......Soluble in hot concentrated alkali and HF Moderately soluble (<10%) in 1N NaOH Slightly soluble (<3%) in mineral acids (1N) Very slightly soluble (<1%) in water or weak acids
Uses for Perlite...
There are many uses for perlite. These uses can be broken down into three general categories: construction applications, horticultural applications, and industrial applications. Construction Applications Conversion Table U.S. Mesh Inches Microns MM 3 .265 6730 6.73 4 .187 4760 4.76 5 .157 4000 4.00 6 .132 3360 3.36 7 .111 2830 2.83 8 .0937 2380 2.38 10 .0787 2000 2.00 12 .0661 1680 1.68 14 .0555 1410 1.41 16 .0469 1190 1.19 18 .0394 1000 1.00 20 .0331 841 .841 25 .0280 707 .707 30 .0232 595 .595 35 .0197 500 .500 40 .0165 420 .420 45 .0138 354 .354 50 .0117 297 .297 60 .0098 250 .250 70 .0083 210 .210 80 .0070 177 .177 100 .0059 149 .149 120 .0049 125 .125 140 .0041 105 .105 170 .0035 88 .088 200 .0029 74 .074 230 .0024 63 .062 270 .0021 53 .053 325 .0017 44 .044 400 .0015 37 .037 550 .0009 25 .025 Because of perlite's outstanding insulating characteristics and light weight, it is widely used as a loose-fill insulation in masonry construction. In this application, free-flowing perlite loose-fill masonry insulation is poured into the cavities of concrete block where it completely fills all cores, crevices, mortar areas and ear holes. In addition to providing thermal insulation, perlite enhances fire ratings, reduces noise transmission and it is rot, vermin and termite resistant. Perlite is also ideal for insulating low temperature and cryogenic vessels. When perlite is used as an aggregate in concrete, a lightweight, fire resistant, insulating concrete is produced that is ideal for roof decks and other applications. Perlite can also be used as an aggregate in Portland cement and gypsum plasters for exterior applications and for the fire protection of beams and columns. Other construction applications include under-floor insulation, chimney linings, paint texturing, gypsum boards, ceiling tiles, and roof insulation boards. Horticultural Applications In horticultural applications, perlite is used throughout the world as a component of soilless growing mixes where it provides aeration and optimum moisture retention for superior plant growth. For rooting cuttings, 100% perlite is used. Studies have shown that outstanding yields are achieved with perlite hydroponic systems. Other benefits of horticultural perlite are its neutral pH and the fact that it is sterile and weed-free. In addition, its light weight makes it ideal for use in container growing. Other horticultural applications for perlite are as a carrier for fertilizer, herbicides and pesticides and for pelletizing seed. Horticultural perlite is as useful to the home gardener as it is to the commercial grower. It is used with equal success in greenhouse growing, landscaping applications and in the home in house plants. Industrial Applications Industrial applications for perlite are the most diverse, ranging from high performance fillers for plastics to cements for petroleum, water and geothermal wells. Other applications include its use as a filter media for pharmaceuticals, food products, chemicals and water for municipal systems and swimming pools. Additional applications include its use as an abrasive in soaps, cleaners, and polishes; and a variety of foundry applications utilizing perlite's insulating properties and high heat resistance. This same heat resistant property is taken advantage of when perlite is used in the manufacture of refractory bricks, mortars, and pipe insulation.

Pictures,	links,	and	a
brief	description	of	the	properties
and	applications	of	this	siliceous
rock.

http://www.perlite.net/

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Pictures, links, and a brief description of the properties and applications of this siliceous rock.

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