Hematit
Hematit, chemický vzorec Fe2O3 (oxid železitý), je klencový minerál.
Název hematit je řeckého původu, haĩma - αιματoεις (krev) přes latinské haema a vystihuje barvu minerálu. Starší český název je krevel.
Obsah[skrýt] |
Vznik
Původ magmatický, hydrotemální (střední a nižší teploty), metamorfní i sedimentární (vysrážením z mořské vody).
Morfologie
Nejčastěji v zrnitých až celistvých, paprsčitě vláknitých až zemitých agregátech, složený z oválných útvarů velikosti hrachu až máku. Méně často v hrubě krystalických agregátech nebo šupinatý. Krystaly jsou vzácné, mají tvar šupinek, tabulek, romboedrů, často dvojčatí.
Vlastnosti
- Fyzikální vlastnosti: Tvrdost 5-6 (zemité formy i 1), hustota 5,2 g/cm³, neštěpný – odlučnost je podmíněna dvojčatěním podle {0001}, lom lasturnatý, křehký. Slabě magnetický.
- Optické vlastnosti: Barva: červená, hnědá, šedá až černá, lesk kovový, matný, průhlednost: průsvitný až opaktní, vryp višňově červený, červenohnědý.
- Chemické vlastnosti: Složení: Fe 69,94 %, O 30,06 %, příměsi Ti často až do 9 %, Mn, Al. Rozpustný v koncentrované HCl. Před dmuchavkou se netaví. Žíháním v oxidačním plameni se mění v magnetit.
Odrůdy
- spekularit
- hematitová růže
Podobné minerály
goethit, limonit, pyrofanit, ilmenit, magnetit, chromit
Získávání
Hematit se těží v povrchových dolech za pomoci těžké techniky.
Využití
Důležitá ruda železa, čistý obsahuje až 70 % železa. Jemnozrnný zemitý a mletý se používá jako barvivo (rudka) nebo lešticí prášek. Někdy jako ozdobný a drahý kámen (fasetové brusy, kabošony, gemy).
Naleziště
Hojný minerál.
- Česko – Narysov, Horní Blatná, Hradiště
- Slovensko – Rudňany, Rožňava
- Švédsko – Striberg, Norberg, Blötberg
- Ukrajina – Krivoj Rog
- Rusko – Kursk
- Brazílie – Matto Grosso
- a další.
Komentáře
Přehled komentářů
Hello! I am inviting you to my absolutely free online webcam chat with a pretty and entrancing webcam model. Find me there https://cnqw.b1-1-529.com and make sure it’s true!
Will grant you all dirty wishes online! I will be online within another 5 minutes! Let it all be between you and me!
Simple printable yearly calendar
(Nilsar, 19. 10. 2022 2:21)
A schedule can be a advantageous tool for the purpose keeping railroad of the time. Single can take advantage of calendars to pay attention to watch of impressive dates and events in at one’s life.
When printed, calendars are undemanding to pinch around. They can be tempered to as a helpful reminder of upcoming events, such as birthdays, graduations, weddings, or holidays. This can ease a личность system onwards and evade making last-minute plans.
Dated https://t.me/s/printable_calendar - blank printable calendar is a precarious and mild to exercise tool in importance to hold track of your events. It is a great addition to your organization. The printable almanac has the flexibility to put all the events that are noteworthy to you in a person place. Provoke your individual almanac online with the help of the printable calendar.
business mind
(CecilSog, 18. 10. 2022 0:13)https://ru.pinterest.com/pin/760193612119939654/
International business.
(hug, 14. 10. 2022 5:05)
I Got my first money out very easily. Deepnfast is a Social Network of Mutual Help for each member. You help once and then people from different countries help you! You can build your business or simply expect a 'overflow' from your partners. Registration is free! Helpdesk support is available for all questions!
https://deepnfast.com/invite/XSTU1aju
Offer of cooperation.
(Leehug, 12. 10. 2022 20:57)
My name is Lee hug. My letter is addressed to the owner of this website. I am a partner of deepnfast.com - The new international network of mutual financial support.
Service is designed to ensure that everyone who wants to improve their financial situation, could get support from other people around the world! Working Marketing allows you to develop a business structure with profits up to $500,000. I am building my business and I invite You to become part of this Financial Structure! I think You will be interested in this proposal, which includes help from partners, that is, I will participate in the development of Your business.
https://deepnfast.com/invite/XSTU1aju
The question is interesting, I too will take part in discussion. Together we can come to a right answer. I am assured.
(DwainAvaxy, 12. 10. 2022 20:19)
Quite right! It is good thought. I call for active discussion.
https://kzxo.info
https://delphinium-blue.com
Jili178
(RaymondImito, 5. 10. 2022 0:06)
Jili178 online casino bonus quota extra much bigger
Jili178 how to register get 150%
Is it easy to get promo and special offers here.
Jili178 Gcash deposit 78 get 178 bonus
Jili178 Bonus daily update!
We have Jili178 agent system to drive traffic to your betting website and boost your revenue.
Jili178 live show, super ace, fishing game up to 1000games
Come and fuck me. Come on! I wanna suck your dick and balls. So wake up and let me in!
(CindyMup, 2. 10. 2022 15:34)
Come and fuck me, baby! I wanna suck your dick and balls. So wake up and find me here https://cutt.us/ZerbK I can’t wait any longer. Will get on my knees and suck you off!
This offer comes once in a lifetime.
complete training
(RandyElome, 2. 10. 2022 11:01)https://www.ladynouveau.com/profile/portergosewisch16129912/profile БеÑплатные ÑмулÑторы игровых автоматов на андроид zte https://karmaluck.net/profile/ferdinanddoberstein1385919/profile Игровые автоматы акулы онлайн https://www.hannahgrisevichart.com/profile/edgardomanetta15732517/profile Игровой автомат вулкан на деньги Ð´ÐµÐ»ÑŽÐºÑ https://pralinebengals.fr/profile/felixhonse19638106/profile Играть фрукт Ð½Ð¸Ð½Ð´Ð·Ñ Ð½Ð° компьютер https://connectingculturesforpeace.com/profile/jericabonnenfant4089893/profile Картинки пушки из танки онлайн вулкан https://www.goldlighthouse.org/profile/ligiahalbert16734243/profile Игровой автомат Ñнайпер как играть https://cortlandtsonthegonotary.com/profile/carltonkozuch17657114/profile Игровой автомат silent run
apartment for rent
(Jeremyapere, 1. 10. 2022 22:09)
www.iroomit.com find a roommate or a room for rent, where ever you live. can find roommates, a room near me, or an apartment for rent, or a roommate near me. rent a spare room. Our smart algorithm can find a roommate, roommates. Start free listing and advertise roommates wanted, apartment for rent
headache try
(RandyElome, 1. 10. 2022 15:29)https://dekrachtvandeverschillen.nl/profile/glennismanues16818156/profile Ð’Ñе игровые автоматы Ð»Ð°Ñ Ð²ÐµÐ³Ð°Ñа https://www.cherishnutrition.net/profile/marileebjorkquist172416/profile СимулÑторы игровых аппаратов беÑплатно играть https://www.robwilliamsmusic.com/profile/heribertobrazile6079642/profile Игровые автоматы печки ÐºÐµÐºÑ https://livingstronghealingcentre.com/profile/kacigroch9691470/profile Игровой автомат Ñ€Ð°Ð¼Ð·ÐµÑ 2 https://latiendadelasmascotas.shop/profile/lenardtoce14695238/profile Сайт friends casino https://www.varnvillefbc.org/profile/candycecoopey7735613/profile БеÑплатные онлайн игры Ñлот без региÑтрации https://hilalyardim.de/profile/ashleighbrooms13442250/profile Игровые автоматы жмÑ
development untidy
(RandyElome, 1. 10. 2022 5:58)https://www.evangit.com/profile/felipamatusiak3256206/profile Онлайн казино 5000 за региÑтрацию https://www.fowlerlawn.com/profile/miltoncrapp9322574/profile Гараж автоматы играть https://www.anikesbliss.com/profile/nealkalpakoff3119077/profile Игровые автоматы играть беÑплатно режиме демо https://littlemousebooks.org/profile/fredricgramling13867189/profile Игровые автоматы играть играÑофты беÑплатно без ригеÑтраций 777 https://winwithintherapy.com/profile/emilekanai14284573/profile Игровые автоматы Ñ‚ÐµÑ…Ð½Ð¾Ð»Ð¾Ð³Ð¸Ñ https://www.lashshrink.com/profile/taishacandelaria17130507/profile Лимон игровые автоматы https://www.miamacom.com/profile/mechelleverderame3365584/profile Ðзартные игры завиÑимоÑÑ‚ÑŒ лечение г павлодар
contract grant
(RandyElome, 30. 9. 2022 20:17)https://usoagency.com/profile/daltonmcnaughton2899288/profile УÑтановить игровые автоматы беÑплатно без региÑтрации https://www.plenituddegozo.com/profile/monniewaisath19500631/profile Играть мега джокер https://wakuwakutoyohashi.com/profile/ezekielmeisenheimer10753308/profile Можно ли на Ñамом деле выиграет деньги на вулкане https://arquidesignonline.com/profile/shawndaelfrink17429358/profile Скачать казино игры беÑплатно на компьютер офлайн https://www.skyd-rajahmudry.com/profile/alicaamoros3745713/profile Игровой автомат бабочка https://nakaea.com/profile/martinmichaeli19387053/profile Игровой автомат фрукты и короли https://www.cfc-comanimale.com/profile/yahairaneyland2255219/profile Бездепы на онлайн казино
Bravo, very good idea
(DwainAvaxy, 30. 9. 2022 12:03)
In my opinion you commit an error. I suggest it to discuss. Write to me in PM, we will communicate.
https://thetranny.com/videos/105345/pee-hentai-japanese-ladyboy/
https://zeenite.com/tags/chubby-pussy/
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50
Appealing chuck will carry out your sexual orders online! Let it be our secret!
(WarnaCed, 20. 10. 2022 10:09)