{"id":5147,"date":"2026-09-20T03:13:53","date_gmt":"2026-09-20T03:13:53","guid":{"rendered":"https:\/\/crystals.rocks\/"},"modified":"2026-09-20T05:52:48","modified_gmt":"2026-09-20T05:52:48","slug":"krotite","status":"publish","type":"post","link":"https:\/\/crystals.rocks\/vi\/article\/krotite\/","title":{"rendered":"Krotite"},"content":{"rendered":"

Krotit l\u00e0 m\u1ed9t kho\u00e1ng ch\u1ea5t oxit canxi\u2013nh\u00f4m t\u1ef1 nhi\u00ean v\u1edbi c\u00f4ng th\u1ee9c h\u00f3a h\u1ecdc l\u00fd t\u01b0\u1edfng CaAl\u2082O\u2084<\/strong>N\u00f3 \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i l\u00e0 m\u1ed9t kho\u00e1ng ch\u1ea5t oxit v\u00e0 ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn t\u1eeb c\u00e1c kh\u1ed1i trong su\u1ed1t gi\u00e0u canxi-aluminium trong c\u00e1c meteorit carbonat th\u00f4 s\u01a1. Kh\u00e1c v\u1edbi h\u1ea7u h\u1ebft c\u00e1c kho\u00e1ng ch\u1ea5t th\u00f4ng th\u01b0\u1eddng tr\u00ean Tr\u00e1i \u0110\u1ea5t, Krotite th\u01b0\u1eddng hi\u1ec7n di\u1ec7n d\u01b0\u1edbi d\u1ea1ng h\u1ea1t vi m\u00f4 \u0111\u01b0\u1ee3c nh\u00fang trong meteorit ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 tinh th\u1ec3 l\u1edbn, ri\u00eang l\u1ebb.<\/p>\n

C\u00f4ng th\u1ee9c l\u00fd t\u01b0\u1edfng ch\u1ee9a m\u1ed9t nguy\u00ean t\u1eed canxi, hai nguy\u00ean t\u1eed nh\u00f4m v\u00e0 b\u1ed1n nguy\u00ean t\u1eed oxi. Th\u00e0nh ph\u1ea7n l\u00fd thuy\u1ebft c\u1ee7a n\u00f3 kho\u1ea3ng 25,4% kh\u1ed1i l\u01b0\u1ee3ng canxi, 34,1% kh\u1ed1i l\u01b0\u1ee3ng nh\u00f4m v\u00e0 40,5% kh\u1ed1i l\u01b0\u1ee3ng oxi. \u0110\u01b0\u1ee3c bi\u1ec3u di\u1ec5n d\u01b0\u1edbi d\u1ea1ng oxit, th\u00e0nh ph\u1ea7n t\u01b0\u01a1ng \u1ee9ng kho\u1ea3ng 35,5% kh\u1ed1i l\u01b0\u1ee3ng CaO v\u00e0 64,5% kh\u1ed1i l\u01b0\u1ee3ng Al\u2082O\u2083. C\u00e1c h\u1ea1t t\u1ef1 nhi\u00ean c\u00f3 th\u1ec3 ch\u1ee9a c\u00e1c sai l\u1ec7ch h\u00f3a h\u1ecdc nh\u1ecf, nh\u01b0ng kho\u00e1ng ch\u1ea5t \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi c\u1ea3 th\u00e0nh ph\u1ea7n CaAl\u2082O\u2084 c\u1ee7a n\u00f3 v\u00e0 c\u1ea5u tr\u00fac tinh th\u1ec3 \u0111\u1eb7c tr\u01b0ng c\u1ee7a n\u00f3.<\/p>\n

\"krotite\"
krotite<\/figcaption><\/figure>\n

Krotite l\u00e0 d\u1ea1ng th\u1ea5p \u00e1p su\u1ea5t c\u1ee7a CaAl\u2082O\u2084. D\u1ea1ng cao \u00e1p su\u1ea5t \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 dmitryivanovite. Hai kho\u00e1ng ch\u1ea5t n\u00e0y c\u00f3 c\u00f9ng c\u00f4ng th\u1ee9c h\u00f3a h\u1ecdc l\u00fd t\u01b0\u1edfng nh\u01b0ng c\u00f3 c\u1ea5u tr\u00fac nguy\u00ean t\u1eed kh\u00e1c nhau, v\u00ec v\u1eady ch\u00fang ph\u1ea3i \u0111\u01b0\u1ee3c ph\u00e2n bi\u1ec7t b\u1eb1ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p tinh th\u1ec3 h\u1ecdc ch\u1ee9 kh\u00f4ng ch\u1ec9 d\u1ef1a v\u00e0o th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc. Krotite c\u0169ng c\u00f3 m\u1ed1i li\u00ean h\u1ec7 c\u1ea5u tr\u00fac v\u1edbi c\u00e1c h\u1ee3p ch\u1ea5t canxi aluminat t\u1ed5ng h\u1ee3p \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong g\u1ea1ch ch\u1ecbu l\u1eeda v\u00e0 v\u1eefa canxi aluminat, m\u1eb7c d\u00f9 c\u00e1c aluminat canxi c\u00f4ng nghi\u1ec7p kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i t\u1ef1 \u0111\u1ed9ng l\u00e0 kho\u00e1ng Krotite.<\/p>\n

L\u1ecbch s\u1eed v\u00e0 Ph\u00e1t hi\u1ec7n Krotite<\/h2>\n

Krotite \u0111\u00e3 \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 ch\u00ednh th\u1ee9c l\u00e0 m\u1ed9t kho\u00e1ng ch\u1ea5t m\u1edbi v\u00e0o n\u0103m 2011. V\u1eadt li\u1ec7u m\u1eabu \u0111\u1ebfn t\u1eeb meteorit NWA 1934, m\u1ed9t lo\u1ea1i chondrite carbonat thu\u1ed9c nh\u00f3m CV3 \u0111\u01b0\u1ee3c thu th\u1eadp \u1edf B\u1eafc Phi. Kho\u00e1ng ch\u1ea5t n\u00e0y xu\u1ea5t hi\u1ec7n trong c\u00e1c kh\u1ed1i bao g\u1ed3m canxi-aluminium, th\u01b0\u1eddng \u0111\u01b0\u1ee3c vi\u1ebft t\u1eaft l\u00e0 CAI. Nh\u1eefng kh\u1ed1i n\u00e0y l\u00e0 nh\u1eefng th\u00e0nh ph\u1ea7n ch\u1ecbu l\u1eeda cao nh\u1ea5t \u0111\u01b0\u1ee3c b\u1ea3o t\u1ed3n trong c\u00e1c meteorit chondritic nguy\u00ean th\u1ee7y.<\/p>\n

Kho\u00e1ng ch\u1ea5t \u0111\u01b0\u1ee3c \u0111\u1eb7t t\u00ean theo Alexander N. Krot, m\u1ed9t chuy\u00ean gia v\u1ec1 v\u0169 tr\u1ee5 h\u1ecdc, ng\u01b0\u1eddi nghi\u00ean c\u1ee9u t\u1eadp trung v\u00e0o c\u00e1c meteorit h\u1ea1t nh\u00e2n, c\u00e1c th\u00e0nh ph\u1ea7n ch\u1ecbu nhi\u1ec7t, qu\u00e1 tr\u00ecnh ng\u01b0ng t\u1ee5 v\u00e0 s\u1ef1 ti\u1ebfn h\u00f3a h\u00f3a h\u1ecdc ban \u0111\u1ea7u c\u1ee7a H\u1ec7 M\u1eb7t Tr\u1eddi. Kho\u00e1ng ch\u1ea5t n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c Hi\u1ec7p h\u1ed9i Kh\u1ea3o s\u00e1t \u0110\u1ecba ch\u1ea5t Qu\u1ed1c t\u1ebf ph\u00ea duy\u1ec7t v\u1edbi m\u00e3 s\u1ed1 IMA 2010-038.<\/p>\n

M\u00f4 t\u1ea3 ban \u0111\u1ea7u d\u1ef1a tr\u00ean ph\u00e2n t\u00edch h\u00f3a h\u1ecdc, k\u00ednh hi\u1ec3n vi \u0111i\u1ec7n t\u1eed, tinh th\u1ec3 h\u1ecdc v\u00e0 quan s\u00e1t \u0111\u1ecba ch\u1ea5t. S\u1ef1 k\u1ebft h\u1ee3p n\u00e0y l\u00e0 c\u1ea7n thi\u1ebft v\u00ec c\u00e1c h\u1ea1t Krotite nh\u1ecf v\u00e0 xu\u1ea5t hi\u1ec7n trong m\u1ed9t t\u1ed5 h\u1ee3p ph\u1ee9c t\u1ea1p c\u1ee7a oxit canxi-aluminium, silicat v\u00e0 c\u00e1c pha d\u1ec5 n\u00f3ng ch\u1ea3y kh\u00e1c. M\u1ed9t ph\u00e2n t\u00edch h\u00f3a h\u1ecdc g\u1ea7n v\u1edbi CaAl\u2082O\u2084 s\u1ebd kh\u00f4ng \u0111\u1ee7, b\u1edfi v\u00ec m\u1ed9t s\u1ed1 kho\u00e1ng v\u1eadt li\u00ean quan c\u00f3 t\u1ef7 l\u1ec7 nguy\u00ean t\u1ed1 t\u01b0\u01a1ng t\u1ef1 ho\u1eb7c c\u00f3 th\u1ec3 xu\u1ea5t hi\u1ec7n trong c\u00f9ng m\u1ed9t bao b\u1ecdc thi\u00ean th\u1ea1ch.<\/p>\n

H\u00ecnh th\u00e0nh v\u00e0 S\u1ef1 xu\u1ea5t hi\u1ec7n \u0111\u1ecba ch\u1ea5t c\u1ee7a Krotite<\/h2>\n

C\u00e1c d\u1ea1ng Krotite h\u00ecnh th\u00e0nh trong \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 \u00e1p su\u1ea5t th\u1ea5p trong m\u00f4i tr\u01b0\u1eddng h\u00f3a h\u1ecdc c\u00f3 t\u00ednh b\u1ec1n v\u1eefng r\u1ea5t cao. C\u00e1c v\u1eadt th\u1ec3 ch\u1ee9a Krotite trong NWA 1934 \u0111\u01b0\u1ee3c cho l\u00e0 s\u1ea3n ph\u1ea9m c\u1ee7a s\u1ef1 ng\u01b0ng t\u1ee5 ho\u1eb7c k\u1ebft tinh t\u1eeb kh\u00ed n\u00f3ng trong \u0111\u0129a kh\u00ed s\u01a1 khai c\u1ee7a h\u1ec7 M\u1eb7t Tr\u1eddi. C\u00e1c c\u00e2n b\u1eb1ng pha cho th\u1ea5y s\u1ef1 h\u00ecnh th\u00e0nh \u1edf nhi\u1ec7t \u0111\u1ed9 kho\u1ea3ng 1.500 \u00b0C ho\u1eb7c cao h\u01a1n trong \u0111i\u1ec1u ki\u1ec7n \u00e1p su\u1ea5t th\u1ea5p. Nh\u1eefng \u0111i\u1ec1u ki\u1ec7n n\u00e0y ph\u00f9 h\u1ee3p v\u1edbi s\u1ef1 h\u00ecnh th\u00e0nh c\u00e1c ch\u1ea5t r\u1eafn b\u1ec1n v\u1eefng tr\u01b0\u1edbc khi ng\u01b0ng t\u1ee5 c\u1ee7a nhi\u1ec1u nguy\u00ean t\u1ed1 v\u00e0 kho\u00e1ng ch\u1ea5t d\u1ec5 bay h\u01a1i h\u01a1n.<\/p>\n

Canxi v\u00e0 nh\u00f4m l\u00e0 trong s\u1ed1 nh\u1eefng nguy\u00ean t\u1ed1 ch\u00ednh \u00edt d\u1ec5 bay h\u01a1i nh\u1ea5t trong \u0111\u0129a kh\u00ed m\u1eb7t tr\u1eddi. Khi kh\u00ed nebulas n\u00f3ng ngu\u1ed9i \u0111i, c\u00e1c nguy\u00ean t\u1ed1 n\u00e0y c\u00f3 th\u1ec3 k\u1ebft h\u1ee3p v\u1edbi oxi \u0111\u1ec3 t\u1ea1o th\u00e0nh oxit b\u1ec1n nhi\u1ec7t v\u00e0 silicat canxi-nh\u00f4m. Do \u0111\u00f3, krotit ghi l\u1ea1i giai \u0111o\u1ea1n nhi\u1ec7t \u0111\u1ed9 cao c\u1ee7a s\u1ef1 h\u00ecnh th\u00e0nh kho\u00e1ng ch\u1ea5t x\u1ea3y ra tr\u01b0\u1edbc khi ti\u1ec3u h\u00e0nh tinh m\u1eb9 c\u1ee7a vi\u00ean \u0111\u00e1 qu\u00fd \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh. S\u1ef1 h\u00ecnh th\u00e0nh c\u1ee7a n\u00f3 kh\u00f4ng n\u00ean b\u1ecb nh\u1ea7m l\u1eabn v\u1edbi c\u00e1c qu\u00e1 tr\u00ecnh n\u00fai l\u1eeda, th\u1ee7y nhi\u1ec7t ho\u1eb7c bi\u1ebfn ch\u1ea5t th\u00f4ng th\u01b0\u1eddng tr\u00ean Tr\u00e1i \u0111\u1ea5t.<\/p>\n

Trong NWA 1934, Krotite t\u1eadp trung \u1edf ph\u1ea7n trung t\u00e2m v\u00e0 l\u1edbp ph\u1ee7 c\u1ee7a m\u1ed9t kh\u1ed1i l\u01b0\u1ee3ng canxi-aluminium gi\u00e0u b\u1ea5t th\u01b0\u1eddng. N\u00f3 xu\u1ea5t hi\u1ec7n c\u00f9ng v\u1edbi perovskite, gehlenite, hercynite, mayenite, grossite, hibonite, spinel v\u00e0 diopsid. Hexamolybdenum \u1edf d\u1ea1ng v\u1ebft c\u0169ng \u0111\u00e3 \u0111\u01b0\u1ee3c b\u00e1o c\u00e1o. T\u1ed5 h\u1ee3p kho\u00e1ng ch\u1ea5t cho th\u1ea5y kh\u1ed1i l\u01b0\u1ee3ng \u0111\u00e3 tr\u1ea3i qua nhi\u1ec1u giai \u0111o\u1ea1n ng\u01b0ng t\u1ee5, k\u1ebft tinh, ph\u1ea3n \u1ee9ng v\u00e0 c\u00f3 th\u1ec3 l\u00e0 tan ch\u1ea3y m\u1ed9t ph\u1ea7n thay v\u00ec h\u00ecnh th\u00e0nh th\u00f4ng qua m\u1ed9t ph\u1ea3n \u1ee9ng \u0111\u01a1n gi\u1ea3n duy nh\u1ea5t.<\/p>\n

Ph\u1ea7n b\u00ean ngo\u00e0i c\u1ee7a s\u1ef1 bao g\u1ed3m \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 l\u00e0 c\u00f3 v\u1ebb ngo\u00e0i gi\u1ed1ng v\u1ecf tr\u1ee9ng b\u1ecb n\u1ee9t ho\u1eb7c \"tr\u1ee9ng n\u1ee9t\". M\u1ed9t s\u1ed1 v\u1ebft n\u1ee9t \u0111\u01b0\u1ee3c l\u1ea5p \u0111\u1ea7y b\u1edfi hydroxit s\u1eaft v\u00e0 nh\u00f4m. Nh\u1eefng kho\u00e1ng ch\u1ea5t ng\u1eadm n\u01b0\u1edbc n\u00e0y \u0111\u01b0\u1ee3c gi\u1ea3i th\u00edch l\u00e0 s\u1ea3n ph\u1ea9m c\u1ee7a qu\u00e1 tr\u00ecnh phong h\u00f3a tr\u00ean Tr\u00e1i \u0110\u1ea5t \u0111\u00e3 x\u1ea3y ra sau khi thi\u00ean th\u1ea1ch \u0111\u1ebfn Tr\u00e1i \u0110\u1ea5t. Ch\u00fang kh\u00f4ng \u0111\u01b0\u1ee3c coi l\u00e0 s\u1ea3n ph\u1ea9m ban \u0111\u1ea7u c\u1ee7a m\u00f4i tr\u01b0\u1eddng \u0111\u0129a kh\u00ed m\u1eb7t tr\u1eddi. S\u1ef1 ph\u00e2n bi\u1ec7t n\u00e0y r\u1ea5t quan tr\u1ecdng v\u00ec qu\u00e1 tr\u00ecnh phong h\u00f3a c\u00f3 th\u1ec3 l\u00e0m thay \u0111\u1ed5i c\u00e1c ranh gi\u1edbi v\u00e0 b\u1ec1 m\u1eb7t c\u1ee7a c\u00e1c h\u1ea1t Krotite ban \u0111\u1ea7u.<\/p>\n

C\u1ea5u tr\u00fac tinh th\u1ec3 c\u1ee7a Krotite<\/h2>\n

Krotite k\u1ebft tinh trong h\u1ec7 tinh th\u1ec3 \u0111\u01a1n gi\u1ea3n. Nh\u00f3m kh\u00f4ng gian \u0111\u01b0\u1ee3c b\u00e1o c\u00e1o l\u00e0 P2\u2081\/n<\/strong>, s\u1ed1 nh\u00f3m kh\u00f4ng gian 14. C\u00e1c tham s\u1ed1 t\u1ebf b\u00e0o \u0111\u01a1n v\u1ecb x\u00e1c \u0111\u1ecbnh cho v\u1eadt li\u1ec7u ki\u1ec3u l\u00e0 kho\u1ea3ng a = 8,6996 (3) \u00c5<\/strong>, b = 8,0994(3) \u00c5<\/strong>, c = 15,217(1) \u00c5<\/strong>, v\u00e0 \u03b2 = 90,188(6)\u00b0<\/strong>. \u00d4n th\u1ec3 ch\u1ee9a m\u01b0\u1eddi hai \u0111\u01a1n v\u1ecb c\u00f4ng th\u1ee9c, \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n d\u01b0\u1edbi d\u1ea1ng Z = 12<\/strong>, v\u00e0 c\u00f3 th\u1ec3 t\u00edch t\u00ednh to\u00e1n kho\u1ea3ng 1.071 \u00c5\u00b3.<\/p>\n

C\u1ea5u tr\u00fac c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 m\u1ed9t c\u00e1ch t\u1ed5ng qu\u00e1t l\u00e0 m\u1ed9t khung b\u1ecb chi ph\u1ed1i b\u1edfi c\u00e1c kh\u1ed1i \u0111a di\u1ec7n nh\u00f4m-oxy, \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c t\u1ee9 di\u1ec7n AlO\u2084, v\u1edbi canxi chi\u1ebfm c\u00e1c v\u1ecb tr\u00ed c\u1ea5u tr\u00fac l\u1edbn h\u01a1n trong khung. S\u1ef1 s\u1eafp x\u1ebfp n\u00e0y kh\u00f4ng t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi c\u1ea5u tr\u00fac spinel, d\u00f9 c\u00f4ng th\u1ee9c h\u00f3a h\u1ecdc c\u00f3 m\u1ed1i quan h\u1ec7 h\u00f3a tr\u1ecb chung l\u00e0 m\u1ed9t cation hai h\u00f3a tr\u1ecb v\u1edbi hai cation ba h\u00f3a tr\u1ecb v\u00e0 b\u1ed1n nguy\u00ean t\u1eed oxy.<\/p>\n

S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa Krotite v\u00e0 dmitryivanovite l\u00e0 c\u1ea5u tr\u00fac ch\u1ee9 kh\u00f4ng ph\u1ea3i th\u00e0nh ph\u1ea7n. C\u1ea3 hai pha \u0111\u1ec1u c\u00f3 c\u00f4ng th\u1ee9c CaAl\u2082O\u2084, nh\u01b0ng ch\u00fang \u1ed5n \u0111\u1ecbnh d\u01b0\u1edbi c\u00e1c \u0111i\u1ec1u ki\u1ec7n \u00e1p su\u1ea5t kh\u00e1c nhau v\u00e0 c\u00f3 c\u00e1ch s\u1eafp x\u1ebfp nguy\u00ean t\u1eed kh\u00e1c nhau. Krotite \u0111\u1ea1i di\u1ec7n cho d\u1ea1ng \u00e1p su\u1ea5t th\u1ea5p, trong khi dmitryivanovite li\u00ean quan \u0111\u1ebfn \u0111i\u1ec1u ki\u1ec7n \u00e1p su\u1ea5t cao.<\/p>\n

V\u00ec Krotite t\u1ef1 nhi\u00ean t\u1ed3n t\u1ea1i d\u01b0\u1edbi d\u1ea1ng c\u00e1c h\u1ea1t nh\u1ecf \u0111\u01b0\u1ee3c bao b\u1ecdc b\u1edfi c\u00e1c kho\u00e1ng ch\u1ea5t kh\u00e1c, c\u00e1c m\u1eb7t tinh th\u1ec3 b\u00ean ngo\u00e0i ph\u00e1t tri\u1ec3n t\u1ed1t l\u00e0 kh\u00f4ng ph\u1ed5 bi\u1ebfn. Th\u00f4ng tin c\u1ea5u tr\u00fac do \u0111\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c thu th\u1eadp b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p nhi\u1ec5u x\u1ea1 tia X, nhi\u1ec5u x\u1ea1 \u0111i\u1ec7n t\u1eed ho\u1eb7c nhi\u1ec5u x\u1ea1 \u0111i\u1ec7n t\u1eed ph\u1ea3n x\u1ea1. C\u00e1c ph\u01b0\u01a1ng ph\u00e1p n\u00e0y \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch khi c\u00e1c h\u1ea1t qu\u00e1 nh\u1ecf \u0111\u1ec3 ph\u00e2n t\u00edch tinh th\u1ec3 \u0111\u01a1n th\u00f4ng th\u01b0\u1eddng.<\/p>\n

T\u00ednh ch\u1ea5t v\u1eadt l\u00fd v\u00e0 h\u00f3a h\u1ecdc c\u1ee7a Krotite<\/h2>\n

Krotite th\u01b0\u1eddng \u0111\u01b0\u1ee3c quan s\u00e1t d\u01b0\u1edbi d\u1ea1ng h\u1ea1t vi m\u00f4 trong c\u00e1c ti\u1ebft di\u1ec7n m\u00e0i ho\u1eb7c ti\u1ebft di\u1ec7n m\u1ecfng. M\u00f4 t\u1ea3 m\u00e0u s\u1eafc v\u00e0 \u0111\u1ed9 s\u00e1ng c\u1ee7a n\u00f3 \u00edt c\u00f3 gi\u00e1 tr\u1ecb ch\u1ea9n \u0111o\u00e1n h\u01a1n so v\u1edbi h\u00f3a h\u1ecdc v\u00e0 c\u1ea5u tr\u00fac tinh th\u1ec3 c\u1ee7a n\u00f3 v\u00ec v\u1ebb ngo\u00e0i th\u1ef1c t\u1ebf ph\u1ee5 thu\u1ed9c v\u00e0o \u0111\u1ed9 d\u00e0y h\u1ea1t, h\u01b0\u1edbng, c\u00e1c kho\u00e1ng ch\u1ea5t xung quanh v\u00e0 s\u1ef1 bi\u1ebfn \u0111\u1ed5i. V\u1eadt li\u1ec7u t\u1ef1 nhi\u00ean c\u00f3 th\u1ec3 xu\u1ea5t hi\u1ec7n kh\u00f4ng m\u00e0u \u0111\u1ebfn n\u00e2u nh\u1ea1t d\u01b0\u1edbi \u00e1nh s\u00e1ng truy\u1ec1n qua ho\u1eb7c ph\u1ea3n chi\u1ebfu, trong khi c\u00e1c ranh gi\u1edbi c\u1ee7a t\u1eebng h\u1ea1t c\u00f3 th\u1ec3 kh\u00f3 ph\u00e2n bi\u1ec7t trong c\u00e1c kh\u1ed1i l\u1eabn l\u1ed9n ph\u1ee9c t\u1ea1p.<\/p>\n

C\u1ee9ng \u0111\u1ed9 Mohs \u0111\u01b0\u1ee3c b\u00e1o c\u00e1o l\u00e0 kho\u1ea3ng 6,5, v\u00e0 m\u1eadt \u0111\u1ed9 t\u00ednh to\u00e1n l\u00e0 kho\u1ea3ng 2,94 g\/cm\u00b3. \u0110o m\u1eadt \u0111\u1ed9 tr\u1ef1c ti\u1ebfp r\u1ea5t kh\u00f3 kh\u0103n v\u00ec c\u00e1c h\u1ea1t r\u1ea5t nh\u1ecf v\u00e0 th\u01b0\u1eddng li\u00ean k\u1ebft v\u1edbi c\u00e1c pha kh\u00e1c. T\u00e1ch r\u1eddi v\u00e0 v\u1ee1 c\u0169ng r\u1ea5t kh\u00f3 \u0111\u00e1nh gi\u00e1 ch\u00ednh x\u00e1c tr\u00ean t\u1eebng h\u1ea1t ri\u00eang l\u1ebb do c\u00f9ng l\u00fd do \u0111\u00f3.<\/p>\n

Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc l\u00fd t\u01b0\u1edfng l\u00e0 CaAl\u2082O\u2084. C\u00e1c ph\u00e2n t\u00edch b\u1eb1ng k\u00ednh hi\u1ec3n vi \u0111i\u1ec7n t\u1eed th\u01b0\u1eddng mong \u0111\u1ee3i t\u1ef7 l\u1ec7 canxi tr\u00ean nh\u00f4m g\u1ea7n 1:2, sau khi \u0111\u00e3 t\u00ednh \u0111\u1ebfn oxi v\u00e0 sai s\u1ed1 ph\u00e2n t\u00edch. M\u1ed9t l\u01b0\u1ee3ng nh\u1ecf magie, silic, titan, s\u1eaft, natri ho\u1eb7c c\u00e1c nguy\u00ean t\u1ed1 kh\u00e1c c\u00f3 th\u1ec3 xu\u1ea5t hi\u1ec7n \u1edf m\u1ee9c v\u1ebft ho\u1eb7c c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o b\u1edfi s\u1ef1 nhi\u1ec5m b\u1ea9n t\u1eeb c\u00e1c kho\u00e1ng ch\u1ea5t l\u00e2n c\u1eadn. C\u00e1c th\u00e0nh ph\u1ea7n nh\u1ecf n\u00e0y kh\u00f4ng t\u1ef1 \u0111\u1ed9ng x\u00e1c \u0111\u1ecbnh m\u1ed9t d\u1ea1ng ri\u00eang bi\u1ec7t c\u1ee7a Krotite.<\/p>\n

Krotite ch\u1ec9 \u1ed5n \u0111\u1ecbnh trong m\u1ed9t l\u0129nh v\u1ef1c \u00e1p su\u1ea5t-nhi\u1ec7t \u0111\u1ed9-th\u00e0nh ph\u1ea7n nh\u1ea5t \u0111\u1ecbnh. \u1ede \u00e1p su\u1ea5t cao h\u01a1n, CaAl\u2082O\u2084 c\u00f3 th\u1ec3 nh\u1eadn c\u1ea5u tr\u00fac c\u1ee7a dmitryivanovite. Trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n h\u00f3a h\u1ecdc kh\u00e1c nhau, canxi v\u00e0 nh\u00f4m c\u00f3 th\u1ec3 thay v\u00e0o \u0111\u00f3 h\u00ecnh th\u00e0nh grossite, hibonite, gehlenite, mayenite, perovskite ho\u1eb7c c\u00e1c oxit v\u00e0 silicat canxi-aluminium kh\u00e1c.<\/p>\n

Lo\u1ea1i v\u00e0 C\u00e1c Lo\u1ea1i Krotite<\/h2>\n

Krotite kh\u00f4ng c\u00f3 c\u00e1c lo\u1ea1i \u0111\u00e1 qu\u00fd \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn ch\u00ednh th\u1ee9c ho\u1eb7c c\u00e1c lo\u1ea1i m\u00e0u th\u01b0\u01a1ng m\u1ea1i. C\u00e1c danh m\u1ee5c sau \u0111\u00e2y mang t\u00ednh m\u00f4 t\u1ea3 ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 c\u00e1c ph\u00e2n chia kho\u00e1ng ch\u1ea5t ch\u00ednh th\u1ee9c:<\/p>\n