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bgzlato.com • Виж темата - Кианит (kyanite)

Кианит (kyanite)

Кианит (kyanite)

Мнениеот Караташ » 20 Май 2019, 15:18

Кианит (дистенът)е силикат на алуминия .
Като примеси кианитът съдържа :хром,желязо,титан,манган,калций и др.
Оцветяването му в различни кристалографски посоки се изменя от виолетовосиньо до безцветно и от кобалтовосин или жълтеникавозелено до зелено.
Кристализира в триклинна сингония и образува дългопризматични сплескани кристали.Има отлична цепителност.Намират се кристали и с ефекта „котешко око”.
Наименованието му произлиза от гръцката дума за син цвят кианос,а дистен значи двояк(В различните сечения).
Кианит за ювелирни цели се добива в Южна Африка,Мианмар,Русия,индия и др.
Кианит в България - гр.Чепеларе, вр. Горката (Кричимско), с. Дервишка могила - Сакар

Химическа формула (състав): Al2[SiO4]O
Цветове: безцветен,син,синьо-зелен,виолетов,черен,ряко се среща и розов
Твърдост: 4,5 по дължина и 6-7 напречно по скалата на Моос
Плътност:3,53-3,68 гр./см.куб.
Коефицент на пречупване 1,712 до 1,735
Двулом 0,017
Дисперсия 0,020
Плеохроитен е

Гранат-кианитов шист
DSC_0311.JPG
DSC_0311.JPG (126.18 KiB) Прегледано 10368 пъти

Кианитови кристали в кварц
IMG_4399.jpg
IMG_4399.jpg (57.54 KiB) Прегледано 10368 пъти

IMG_4387.jpg
IMG_4387.jpg (30.95 KiB) Прегледано 10368 пъти
Аватар
Караташ
 
Мнения: 4
Регистриран на: 15 Май 2019, 21:01

Re: Кианит (kyanite)

Мнениеот любо » 20 Май 2019, 20:39

:59: Намира ли се в България?
Аватар
любо
Администратор
 
Мнения: 1281
Регистриран на: 29 Юни 2014, 21:41
Местоположение: дървен шоп

Re: Кианит (kyanite)

Мнениеот Караташ » 20 Май 2019, 23:18

Аватар
Караташ
 
Мнения: 4
Регистриран на: 15 Май 2019, 21:01


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