Apatite

Apatite

Gemstone Info

Gemstone Nqe Lus

Apatite

Yuav tsum muaj kev puas tsuaj hauv peb lub khw


Apatite yog lub npe tseem ceeb rau hexagonal phosphates ntawm kev hloov ua ke, Ca5 (PO4) 3 (OH, Cl, F). Peb hom muaj npe raws li cov kab mob uas muaj zog heev:
Chlorapatite Ca5 (PO4) 3 Cl
Fluorapatite Ca5 (PO4) 3F
Hydroxyapatite Ca5 (PO4) 3 (OH)

Ob hom kev txawv txav ntawm monoclinic

Ob hom monoclinic hloov yog polytypes. Txhua tus tau cais PO4 tetrahedra, nrog kev ua haujlwm Ca2 + ions. Cov pa roj carbon pauv hloov PO4 tetrahedron nrog CO3OH lossis CO3F pawg.

Tsis tas li, apatite yuav txawv nyob rau hauv qhov tsos thiab xim. Nws cov tshuaj lom neeg tau txiav txim siab qhov kawg ntawm 19th caug xyoo. Dhau li ntawd, tus German mineralogist Abraham Gottlob Werner tau muab nws hauv 1786 lub npe no uas tau tshoov siab los ntawm Greek "apatan", txhais tau tias "dag".

Isostructural cov zaub mov

Nws ua haujlwm ua tus thawj coj rau ib pawg isostructural cov zaub mov ntawm cov qauv mis dav dav: A5 (XO4) 3Zq. Hauv cov calcium uas hloov los ntawm strontium, cerium, manganese, yttrium, txhuas thiab phosphorus yog hloov los ntawm arsenic, vanadium, sulphur, silicon… (pyromorphite, vanadinite, mimetite, fluorellestadite…) Lawv yog cov zaub mov ntawm hexagonal lossis pseudo hexagonal-monoclinic qauv, muaj arsenates, phosphates thiab vanadates, muab faib ua ob pawg ntawm apatite thiab pyromorphite.

Apatites yog cov pob zeb me me, feem ntau hauv cov pob zeb magmatic. Lawv cov concentration tsis txaus rau industrial exploitation. Phosphorus muaj nyob hauv cov hlau ores ua tau kis mus rau hauv cov hlau theem: nws tshem tawm hauv lub ripening theem ntawm hlau ore Hlau yog kim.

Hydrothermal apatites

Kev ua hauj lwm hydrothermal apatites tsis tshua pom ntau. Pegmatitic lossis metamorphic yog cov zaub mov ntawm kev lag luam tseem ceeb rau lawv cov ntsiab lus ntawm cov khoom tsis tshua muaj ntau dua li rau lawv cov phosphorus cov ntsiab lus.

Sedimentary apatites

Sedimentary gemstones muaj tshuaj lossis organic keeb kwm. Cov khoom siv raw rau kev lag luam phosphorus yog phosphorite, phosphorous sedimentary pob zeb uas nws lub ntsiab yog carbonato-fluorapatite. Lub cev sib xyaw ntawm cov pob txha caj qaum yog qhov tseem ceeb yog cov roj carbon-hydroxyapatite thiab cov pob txha pob txha ua rau phosphate txo kev ua haujlwm. Calcium phosphate yog soluble nyob rau hauv acidic ib puag ncig, tab sis ntau tsawg dua nyob rau hauv ib puag ncig alkaline (hiav txwv). Kev hloov pauv pH thaum dej ntws mus rau hauv hiav txwv ua rau muaj phosphate nag lossis daus, uas ua rau muaj dej turbid ntawm estuaries.

Ntsuab apatite

Xiav apatite


Yuav tsum muaj kev puas tsuaj hauv peb lub khw

kev ua yuam kev: Cov ntsiab lus yog kev tiv thaiv !!