Hibonite, oa Madagascar

Hibonite Madagascar

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Tlhaloso Project

Hibonite, oa Madagascar

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Hibonite ((Ca, Ce) (Al, Ti, Mg) 12O19) ke moriana o motšo o motšo o nang le boima ba 7.5-8.0 le mohaho oa kristale o nang le mahlakoreng a mane. Ke ntho e sa tloaelehang, empa e fumaneha majoe a phahameng a metamorphic Madagascar. Limela tse ling tsa mongobo ka meteorite ea khale li na le hibonite. Hibonite le eona e na le merafalo e tloaelehileng ho Ca-Al-rich inclusions (CAIs) e fumanoang meteorite e meng ea chondritic. Hibonite e amana haufi-ufi le hibonite-Fe (IMA 2009-027, ((Fe, Mg) Al12O19)) e leng diminerale ea liphetoho ho tloha meteorore ea Allende.

Lejoe le sa tloaelehang haholo, le bitsoa ka mor'a Paul Hibon, eo e neng e le moferefere oa French Madagascar, ea ileng a fumana diminerale ka June 1953. O rometse Jean Behier lipampiri tse ling bakeng sa tlhahlobo ea selemo se le seng. Behier o ile ae lemoha e le ntho e ka 'nang eaba e na le diminerale e ncha' me ae fa lebitso "hibonite". O ile a fetisetsa sampuli ho C. Guillemin, Labratoire de Minéralogie de la Sorbonne, Paris, Fora ho ea hlahlojoa hape. E bile le tlhaloso ea diminerale e ncha ea Curien et al (1956).

Hibonite ho tloha Esiva, sebakeng sa Fort Dauphin, Tuléar, Madagascar
Metshoane, li-crystals tse thata li emisoa ka metamorphosed limestone matrix tse nang le palicoclase ea calcic. Likamano tse ka khonehang ka har'a matrix ke corundum, spinel le thorianite. Ho hlalositsoe ka 1956. E se ke ea ferekanngoa le Hibbenite. Hibonite e bitsoa P. Hibon, ea ileng a sibolla diminerale.

General

Sehlopha: Liminerale tsa oxide
Mokhoa: (Ca, Ce) (Al, Ti, Mg) 12O19
Tsela ea Crystal: Hexagonal
Sehlopha sa Crystal: Diyxagonal dipyramidal (6 / mmm)
Letšoao la HM: (6 / m 2 / m 2 / m)

Boitsebiso

Mmala: Brownish e ntšo ho batsho; bo bofubelu bo bofubelu ka lihlopha tse tšesaane; lebala le leputsoa meteorite
Tloaelo ea Crystal: platy ea prismatic ho penta likhalase tse ngata tsa pyramidal
Cleavage: {0001} e ntle, {1010} e arohanngoa
Fracture: Subconchoidal
Mohs boima ba sekhahla: 7½-8
Luster: Vitreous
Tšoaea: bo bofubelu bo sootho
Diaphaneity: Ho itšoara hantle
Itseng matla a khoheli: 3.84
Matla a bonono: Uniaxial (-)
Refractive index: nω = 1.807 (2), n = = 1.79 (1)
Pleochroism: O = bohlooho bo bosoeu; E = e putsoa

Hibonite, oa Madagascar

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