Образец рентгенограммы

Рентгенограммы образцов: 1) глинозем отжиг 400 ⁰С 1,5 часа и 2) глинозем отжиг 400 ⁰С 1,5 часа и 800 ⁰С 2  часа. Порошковый дифрактометр ДРОН-4 при использовании Cu K_a излучения (l=1.5418 Å) рентгеновской трубки.

Оба вещества имеют один фазовый состав Al₂O₃ с кубической решеткой и гексагональной решеткой. Как представлено на рентгенограмме лучше окристаллизован 2 образец, но четких рефлексов не наблюдается. Если частицы образца достаточно крупные (~мкм), то наблюдаемые широкие пики могут быть следствием перехода фаз Al₂O₃ из одной в другую внутри одной частицы с размытой границей перехода.

MatchedMaterials

A Aluminum Oxide

Formula                                            Al2 O3

Pdf Number                                      10-425

B Aluminum Oxide

Formula                                            Al2 O3

Pdf Number                                      13-373

Card Retrieval

Restrictions

Chemistry

At least one of the following elements and no others must be present:

·O

·Al

Search Results

The search found 208 matching cards.

Graphics

Card Information

Names:                  Aluminum Oxide

                              kappa-Al2 O3\

Formula:                Al2 O3

PDF Number:         13-373

Quality:                  unknown

Subfiles:                inorganic alloy CEM COR CP  FOR

Cell and Symmetry Information

System:                 hexagonal      Space Group:    P        (no.   0)

a:                           5.57               c:                       8.64

Z:                           5

Instrument Information

Wavelength:          0

Comments and Additional Information

Preparation:           Sample obtained by heating gibbsite to 470 C.

Literature References

General:                 Brindley, Choe. Am. Mineral.   46   771 (1961)

Peak Data

PeakList

         h         k        l                            d              I

         1         0        0                        4.8000         15

         0         0        3                        2.8800         25

         2         0        0                        2.4100         50

         2         0        2                        2.1200         50

         1         0        4                        1.9600         35

         2         1        4                        1.3950       100

____________________________________________________________

Card Information

Names:                  Aluminum Oxide

                              gamma-Al2 O3\

Formula:                Al2 O3

PDF Number:         10-425

Quality:                  unknown

Subfiles:                inorganic alloy CEM COR CP  FOR SCM

Cell and Symmetry Information

System:                 cubic             Space Group:    Fd-3m    (no. 227)

a:                           7.90              

Density (Dx):          3.670             Z:                       10.7

Instrument Information

Wavelength:          0

Comments and Additional Information

General:                 Similar powder data given in second edition, page 384 (1961). Synthetic form.

General:                 Slow transition to corundum at 1000 C.

Pattern:                 To replace 00-001-1303.

Literature References

General:                 Rooksby. X-Ray Identification and Crystal Structures of Clay   264 (1951)

Peak Data

PeakList

         h         k        l                            d              I

         1         1        1                        4.5600         40

         2         2        0                        2.8000         20

         3         1        1                        2.3900         80

         2         2        2                        2.2800         50

         4         0        0                        1.9770       100

         5         1        1                        1.5200         30

         4         4        0                        1.3950       100

         4         4        4                        1.1400         20

         7         3        1                        1.0270         10

         8         0        0                        0.9890         10

         8         4        0                        0.8840         10

         8         4        4                        0.8060         20