Ko te Legrandite he kohuke tuarua onge i titoa mai i te konutea arsenate whakamākūkū, e mōhiotia nuitia ana mō tōna kōwhai kaha me te hōhonu. E kīia ana i roto i te hapori kohuke he kōwhai “canary” he “rēmana” rānei, nā tōna āhua whakamīharo e wehe ai i ētahi atu momo konutea. Nō te pūnaha tioata monoclinic a Legrandite, ā, ka tipu hei tioata paraka mārama ki te mārama. Ka kitea ēnei tioata i ngā whakaritenga ātaahua, pērā i ngā rehu whiti, ngā hanganga whaiwhaiā, ngā whakahiato “putanga rā” rānei. Ahakoa he ngāwari—e 4 ki te 5 te ine i te tauine pakeke o Mohs—ko tōna āhua tioata motuhake me tōna kaha tino kōwhai e waiho ai hei mea matua mō te tuhinga pūtaiao me te tiaki kohuke taumata tiketike.
Ko te Hanganga me te Hītori o Legrandite
Ko te Legrandite ehara i te mea he kohuke noa iho; he tohu whenua rerekē. Ka whakarōpūtia hei kohuke tuarua, arā, kāore e tio i te wā e hanga tuatahitia ana te tinana o te kōreko. Engari, ka puta mai i muri rawa i roto i ngā rohe whakawera o ngā putunga konutea e whai arsene ana. Ka tīmata tēnei tukanga ina whakapā atu ngā kohuke sulfide tuatahi ki te mahi matū kaha o te wai whenua e whai hāora ana e tata ana ki te mata o te whenua. Ko te whānau o Legrandite e hiahia ana ki tētahi "matapihi matū whenua" tino kuiti. E hiahia ana ki te nui o te arsene me te konutea kua whakarewaina, engari he tino aro ki tōna taiao. Inā koa, me iti te warowaihā i roto i te taiao; ki te kaha te pākeho pākeho e tata ana, te wai warowaihā rānei e whakahaere ana i te wāhi, ka whakaputaina e te taiao ngā kohuke noa ake pēnei i te Smithsonite, te Adamite rānei. Nā tēnei āhua matū tīkai te take matua e kitea ai te Legrandite i ētahi wāhi ruarua noa iho o te ao, he mea tino onge i te ao māori.
Ko te hītori o Legrandite i tīmata i te tau 1932 i te maina o Flor de Peña i Nuevo León, Mexico. I whakaingoatia hei whakamihi ki a Louis Charles Antoine Legrand, he pūkaha maina no Peretiama nāna i kite tuatahi i ngā tauira ahurei. Mō ngā tekau tau tuatahi i muri i tōna kitenga, he mea iti noa iho a Legrandite i roto i te mātai kōhatu—he mea onge, he mea moroiti, he ruarua nei i kite. I mutu tēnei noho huna i te waenganui o te rautau 1900 i te whakatuwheratanga o ngā pūkoro hōhonu o te maina rongonui o Ojuela i Mapimí, Durango. Nā tēnei wāhi i huri te rongo o Legrandite mai i te kōhatu onge ki te taonga o te ao. Ko te wā tino whai tikanga o tōna hītori i puta i ngā tau 1970 i te kitenga o te “Rā o Aztec,” he tauira whakamīharo e whakaatu ana i te horahanga o ngā tioata kōwhai kanapa. Nā tēnei kitenga kotahi i whakapūmau te mana o Mexico hei puna matua o tēnei momo. Ahakoa kua kitea ētahi putanga tuarua i Tsumeb (Namibia), Lavrion (Karikia), me ētahi wāhi o te Hononga o Amerika, ko ēnei wāhi e whakaputa ana i ngā tioata iti ake, kāore i te tino kanapa, e kore e rite ki ngā horahanga “canary” rongonui, kanapa tonu o ngā putanga o Mexico.
Kei hea e kitea ai te Legrandite?
Ko te taone nui o te ao mo te Legrandite ko te maina o Ojuela i Mapimí, Durango, Mexico. Ko tēnei wāhi rongonui te take o ngā tauira kounga-whare taonga, kounga-ao e noho ana i tēnei rā. Ko te mea e tino rerekē ai te Legrandite o Mexico ko tōna tae kōwhai "canary yellow" me tōna āhua tioata "sunburst", e whiti ana ngā tioata pūtioio ki waho i ngā āhua whakamīharo rite ki te rau. Ko ēnei tioata ora tonu e kitea ana i runga i te papa Limonite parauri pōuri, he hononga māori e whakaatu ana i te rerekētanga ataahua, ā, ko te tohu tino nui o te tauira Mexico kounga-nui. I whakapūmau tonu te mana o te maina i ngā tau 1970 i te kitenga o te "Aztec Sun," he tauira tino tika tonu, e noho tonu ana hei paerewa koura mō te momo.
Ko te Tahi Atu Nga Putanga Nui o te Ao
Ahakoa ko Mexico te rangatira o te mākete, kua kitea a Legrandite ki ētahi atu wāhi ruarua, ahakoa he iti ake, he tino onge aua kitenga. I te "whenua mīharo kohuke" o te Tsumeb Mine i Namibia, kua kitea a Legrandite, engari he tino onge tonu; ko ngā tauira mai i tēnei wāhi he kohuke iti, mokemoke noa iho, kāore i rite ki ngā huinga nunui e kitea ana i Durango. Waihoki, ko ngā maina hiriwa tawhito o te Lavrion District i Kariki—arā, te rohe o Kamariza—kua whakaputa i a Legrandite hei kohuke ngira-rite, moroiti, e tino whakanuia ana e ngā kaikohi "micromount". I te United States, ko ngā putunga konutea rongonui o Sterling Hill me Franklin, New Jersey, kua whakaputa i ngā tohu o te kohuke, engari he maha ngā wā kāore i te rite te mārama me te kaha o te tae ki ō rātou hoa no Mexico. Hei whakamutunga, kua kitea ētahi putanga iti i ngā taiao e whai kiko ana i te phosphate o Minas Gerais, Brazil, e whakarato ana i ngā raraunga whai hua ki tō mātou māramatanga pūtaiao mō te whānuitanga o te ao o tēnei kohuke huna.
He Legrandite he toka? Te pūmanawa whakapaipai me ngā whakamahinga whaihua.
Kāore a Legrandite i te kohatu tuku iho e whakamahia ana i roto i te ahumahi whakapaipai arumoni, ahakoa tōna tae kaha me te mārama i ētahi wā. I runga i te tauine Mohs o te pakeke o te kohuke, kei waenganui i te 4 me te 5 tōna tūnga, e tohu ana he nui ake tōna ngāwari i ngā kohatu whakapaipai noa pēnei i te kiripaka, te hapira rānei. I tua atu, nā tōna wehenga motuhake, ka taea te wehewehe, te pakaru rānei ina pā te pānga. Nā ēnei whakaraeraetanga ā-tinana, e kore e taea e te legrandite te tū ki te waku o te mau o ia rā, ki te wera rānei e uru ana ki ngā whakaurunga whakapaipai. Ahakoa ka taea e tētahi tohunga kōhatu matatau te hanga mata o te legrandite mō tētahi kaikohi motuhake, ko ēnei kohatu he mea whakaatu ki roto i ngā pouaka tiaki, kaua hei whakamahi i roto i ngā mōwhiti, i ngā tautau rānei.
I roto i ngā whakamahinga whaihua, kāore he whakamahinga ahumahi, arumoni rānei o te legrandite nā te tino onge. He tino uaua rawa ki te keria hei puna konutea, arsenic rānei. Engari, ko tōna uara matua kei roto i ngā ao o te mātai kohuke me te kohinga taumata teitei. Ka rangahau ngā pūtaiao i te kohuke kia mārama ai ki ngā tukanga whakawhāiti motuhake o ngā putunga arsenic e whai kiko ana, i te wā e titiro ana ngā whare taonga me ngā kaikohi takitahi ki a ia hei tauira ātaahua matua. Mō ngā kaingākau, ko te whakamahinga o te legrandite he mea tino mahi toi māori, me ngā puia hīraurau kounga teitei e noho ana hei haumi nui me ngā pūtake mō te mātauranga ā-whenua.