Foydalanuvchi:Yuldoshov G'ayrat/Axinite-(Mg)

Axinit-(Mg) alyuminiy, kaltsiy va magniyning borosilikat minerali bo'lib, aksinit guruhiga kiradi, magniy tuzilish o'rnida dominant kation sanaladi, uni temir va marganets ham egallashi mumkin. U Tanzaniyaning Manyara mintaqasi, Lelatema tog'laridan va shu bilan bir qatorda Merelani tepaliklarida joylashgan qimmatbaho toshlar topilgan, shuning uchun u o'zining ajoyib hududida joylashgan.^[1] U dastlab magnezioaksinit deb atalar edi, bu uning aksinit guruhiga a'zoligi va magniyning dominant kation sifatidagi roliga ishora qildi. Keyinchalik Xalqaro Mineralogiya Assotsiatsiyasi (IMA) o'z nomini aksinit-(Mg) ga o'zgartirdi.^[2] Ba'zan u kolleksiya marvaridlari sifatida qo'llaniladi.

Fizik va kimyoviy xossalari

Aksinit guruhidagi qolgan minerallar singari, aksinit-(Mg) triklinik tizimga tegishli hisoblanadi, bolta shaklidagi morfologiyaga ega bo'lgan kristallar shaklida namoyon bo'ladi. Uning tuzilishini va hossalari bilan bir qatorda tetraedral va oktaedral tarzda muvofiqlashtirilgan kationlarning o'zgaruvchan qatlamlari ketma-ketligi sifatida tavsiflash mumkindir.^[3]

Depozitlar

Aksinit guruhi minerallari o'rta va past kontaktli metamorfizmda va mintaqaviy yoki metasomatik muhitda rivojlangan bo'ladi, Axinit-(Mg) tez-tez kontakt metamorfizm zonalarida paydo bo'ladi.

Bu nisbatan kam uchraydigan mineral hisoblanib, dunyoning o'nga yaqin joylarida aniqlangan. Yuqorida ko'rsatilgan joylashuv turiga qo'shimcha ravishda, o'lchami 3 sm gacha bo'lgan turli rangdagi shaffof kristalli namunalar Nevada (AQSh), Lunning, Mineral Co, mintaqasida binafsha jigarrang kristallari topilgan.^[4] Ispaniyada El Zursido, Adamuz (Kordova) shahrida joylashgan karerning diabazasida kristall kalsit bilan bog'langan aksinit-(Mg) topilgan.^[5]

Ma'lumotnomalar

↑ Jobbins, E.A., Tresham, A.E. y Young, B. (1975). "Magnesioaxinite, a new mineral found as a blue gemstone from Tanzania". Journal of Gemmology 14 (8): 368–375. doi:10.15506/JoG.1975.14.8.368.
↑ Burke, Arnest A.J. (2008). "Tidying up mineral namesː an IMA-CNMCN scheme for suffixes, hyphens and diacritical marks". The Mineralogical Record 39: 131–135.
↑ Takéuchi, Y., Ozawa, Y., Ito, T., Araki, T., Zoltai, T. y Finney, J.J. (1974). "The B2Si8O30 groups of tetrahedra in axinite and comments on deformation of Si tetrahedra in silicates". Zeitschrift für Kristallographie 140 (5–6): 289–312. doi:10.1524/zkri.1974.140.5-6.289.
↑ Jobbins, E.A., Tresham, A.E. y Young, B.R (1980). "Magnesioaxinite from Lunning, Nevada, and some nomenclature designations for the axinite group.". The Mineralogical Record 11: 13–15.
↑ Calvo, Miguel. Minerales y Minas de España. Vol. IX. Silicatos. Madrid, Spain: Escuela Técnica Superior de Ingenieros de Minas de Madrid. Fundación Gómez Pardo., 2018 — 175-bet. ISBN 978-84-8321-883-9.

[1] Jobbins, E.A., Tresham, A.E. y Young, B. (1975). "Magnesioaxinite, a new mineral found as a blue gemstone from Tanzania". Journal of Gemmology 14 (8): 368–375. doi:10.15506/JoG.1975.14.8.368.

[2] Burke, Arnest A.J. (2008). "Tidying up mineral namesː an IMA-CNMCN scheme for suffixes, hyphens and diacritical marks". The Mineralogical Record 39: 131–135.

[3] Takéuchi, Y., Ozawa, Y., Ito, T., Araki, T., Zoltai, T. y Finney, J.J. (1974). "The B2Si8O30 groups of tetrahedra in axinite and comments on deformation of Si tetrahedra in silicates". Zeitschrift für Kristallographie 140 (5–6): 289–312. doi:10.1524/zkri.1974.140.5-6.289.

[4] Jobbins, E.A., Tresham, A.E. y Young, B.R (1980). "Magnesioaxinite from Lunning, Nevada, and some nomenclature designations for the axinite group.". The Mineralogical Record 11: 13–15.

[5] Calvo, Miguel. Minerales y Minas de España. Vol. IX. Silicatos. Madrid, Spain: Escuela Técnica Superior de Ingenieros de Minas de Madrid. Fundación Gómez Pardo., 2018 — 175-bet. ISBN 978-84-8321-883-9.

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