The mica group of sheet silicate (phyllosilicate) minerals includes several closely related materials having nearly perfect basal cleavage. All are monoclinic, with a tendency towards pseudohexagonal crystals, and are similar in chemical composition. The nearly perfect cleavage, which is the most prominent characteristic of mica, is explained by the hexagonal sheet-like arrangement of its atoms.
The word mica is derived from the Latin word mica, meaning a crumb, and probably influenced by micare, to glitter.
Chemically, micas can be given the general formula
in which
Structurally, micas can be classed as dioctahedral (Y = 4) and trioctahedral (Y = 6). If the X ion is K or Na, the mica is a common mica, whereas if the X ion is Ca, the mica is classed as a brittle mica.
Common micas:
Brittle micas:
Very fine-grained micas, which typically show more variation in ion and water content, are informally termed "clay micas". They include:
Mica and similar may refer to:
Tevita Fifita (born May 7, 1983) is a Tongan-American professional wrestler better known by his ring name Micah while his status with TNA is unknown. He is best known for working for WWE under the name Camacho between 2011 and 2014. He previously worked in WWE's developmental territory, Florida Championship Wrestling, under the name Donny Marlow where he was a one-time FCW Florida Tag Team Champion with CJ Parker. Part of a large wrestling family, he is the cousin of Bad Luck Fale, adoptive brother of Tama Tonga, and the son of Haku.
Born in Kissimmee, Florida, Fifita attended the University of Texas at El Paso [UTEP], where he played football as a defensive end. And graduated with a degree in Liberal Arts with major in Communications Electronic Media and minor in criminal justice.
On February 10, 2009, Fifita signed a developmental contract with World Wrestling Entertainment and was assigned to its developmental territory Florida Championship Wrestling (FCW) as "Tonga". In March, he became known as Agent T., as part of Washington's Secret Service stable alongside Agent D. and Agent C, He later changed his name to Donny Marlow. On July 21, 2011, Marlow and CJ Parker defeated Calvin Raines and Big E. Langston to win the FCW Florida Tag Team Championship. On November 3, Marlow and Parker lost the Tag Team Championship to Brad Maddox and Briley Pierce.
Aloha (pronounced [əˈlo.hə]) in the Hawaiian language means affection, peace, compassion, and mercy. Since the middle of the 19th century, it also has come to be used as an English greeting to say goodbye and hello. "Aloha" is also included in the state nickname of Hawaii, the "Aloha State."
The word aloha derives from the Proto-Polynesian root *qarofa, and ultimately from Proto-Polynesian. It has cognates in other Polynesian languages, such as Samoan alofa and Māori aroha, also meaning "love."
A folk etymology claims that it derives from a compound of the Hawaiian words alo meaning "presence," "front," "face," or "share;" and ha, meaning "breath of life" or "essence of life." Although alo does indeed mean "presence," etc. by itself, the word for "breath" has a long A (hā), whereas the word aloha does not.
The use of the word as a greeting has been reconstructed to Proto-Polynesian. Before contact with the West, other words used for greeting included welina and anoai. Today, "aloha kakahiaka" is the phrase for "good morning." "Aloha ʻauinalā" means "good afternoon" and "aloha ahiahi" means "good evening." "Aloha kākou" is a common form of "welcome/goodbye to all."
Aloha is a 2015 American romantic comedy-drama film written, produced and directed by Cameron Crowe. The film, starring Bradley Cooper, Emma Stone, Rachel McAdams, Bill Murray, John Krasinski, Danny McBride and Alec Baldwin, was released on May 29, 2015. The film received negative reviews from critics, and has grossed only $26 million against a budget of $37 million, making the film a box office bomb.
Military contractor Brian Gilcrest (Bradley Cooper) returns to Hawaii to organize a traditional blessing for a new pedestrian gate on behalf of billionaire Carson Welch (Bill Murray), who intends to develop nearby land into a space center. Following a celebrated military career that ended in shadowy deals in Afghanistan, the now disillusioned Gilcrest is tasked with negotiating a deal with the Hawaiian natives and supporting Carson's launch of a privately funded satellite. Gilcrest's mission is complicated by his former girlfriend Tracy (Rachel McAdams), now married with two children, and his idealistic Air Force liaison, Captain Allison Ng (Emma Stone), whose wide-eyed fascination with space reminds him of his own childhood sense of wonder.
Aloha is an American indie rock band currently signed to Polyvinyl Records. It features Cale Parks, Matthew Gengler, Tony Cavallario and T.J. Lipple.
Aloha began with Tony and Matthew in the summer of 1997 in Bowling Green, Ohio. One of the few bands to ever actually get a record deal based on a demo tape, the band spent time based out of Cleveland. In recent years, Aloha has operated from a number of bases, doing their writing, rehearsing and living in Chicago, Washington D.C., Cleveland, Cincinnati, Rochester, Pittsburgh and Altoona. They have shared the stage with the likes of Q and Not U, Ted Leo, Clinic, as well as Cex and Joan of Arc, two bands in which Cale Parks has been a member.
In 2002, New Music said of their album Sugar, "In the wake of That's Your Fire, Aloha's breathtaking and complex collection of jazz-based, vibraphone-enhanced lullabies, the band's sophomore release hits like a hurricane."
Tony and T.J. began playing together during a lull in Aloha's schedule in late 2002, when they both lived in Pittsburgh. T.J. joined the band in May 2003, when Cale, Tony and Matthew joined him at his grandpa's empty house in Altoona, Pennsylvania. There they began writing 2004's Here Comes Everyone, though at the time they didn't know it. With T.J. came a more focused approach to making music and a host of new tools including marimba, homemade mellotrons, organs and tape manipulations. T.J.'s skilled drumming also allowed Cale to move to the piano on occasion.