DOSEN PROFIL LENGKAP

the mineral amorphous. The affected material is therefore described as metamict. Certain minerals occasionally contain interstitial impurities of radioactive...

Brittle Mohs scale hardness 7.5 Luster Vitreous to adamantine; greasy when metamict. Streak White Diaphaneity Transparent to opaque Specific gravity 4.6–4...

radioactive grains of allanite often have their structure disrupted or are metamict. The age of allanite grains that have not been destroyed by radiation can...

the same structure as scheelite (calcium tungstate, CaWO4), but can be metamict (amorphous) due to radiation damage from its small content of thorium....

fluorescence under ultraviolet light. Some titanite has been found to be metamict, in consequence of structural damage due to radioactive decomposition of...

as anhedral masses. Specimens with a high uranium content are typically metamict and appear coated with a yellow brown earthy rind. Samarskite occurs in...

alter to stishovite with intense pressure, and zircon to cyrtolite (a metamict zircon) with amount of radioactive components and time. In some circumstances...

octahedra of a yellowish or brownish color and resinous luster. It is commonly metamict due to radiation damage from included radioactive elements. Pyrochlore...

occurring cubic zirconia in the form of microscopic grains included in metamict zircon. This was thought to be a byproduct of the metamictization process...

damages the mineral crystal structure rendering it locally amorphous (metamict state); the optical result, termed a radioactive halo or pleochroic halo...

calcium. Due to the radioactive elements contained, Thorite is commonly metamict. With the destructive effects of radioactivity on the crystal lattice,...

Andeson; G. F. Claringbull; R. J. Davis & D. K. Hill (1961). "Ekanite, a new metamict mineral from Ceylon". Nature. 190 (4780): 997. Bibcode:1961Natur.190..997A...

Vitreous Diaphaneity Opaque, translucent in very thin fragments Specific gravity 4.33 to 4.48 Alters to Metamict Other characteristics Radioactive References...

Rakovan, John (7 March 2020). "The Crystallinity of Apatite in Contact with Metamict Pyrochlore from the Silver Crater Mine, ON, Canada". Minerals. 10 (3):...

Science. Hoffmann is also a writer of poetry. His collections include The Metamict State (1987, ISBN 0-8130-0869-7), Gaps and Verges (1990, ISBN 0-8130-0943-X)...

Because of thorium's radioactivity, minerals containing it are often metamict (amorphous), their crystal structure having been damaged by the alpha radiation...

still used today to describe the thermoluminescence exhibited by various metamict minerals. Draper, John William (1847). "On the Production of Light by Heat"...

Rakovan, John (7 March 2020). "The Crystallinity of Apatite in Contact with Metamict Pyrochlore from the Silver Crater Mine, ON, Canada". Minerals. 10 (3):...

"Alpha-decay-induced fracturing in zircon: the transition from the crystalline to the metamict state". Science. 236 (4808): 1556–1559. Bibcode:1987Sci...236.1556C. doi:10...

is only moderate and the mineral displays powder XRD peaks without any metamict-like effects. The color of grayite is most commonly observed as a light...

bearing analog of polycrase-(Y). The type specimen is almost entirely metamict. The ideal formula for uranopolycrase is (U,Y)(Ti,Nb)2O6. The mineral has...

Claringbull, G. F.; Davis, R. J.; Hill, D. K. (10 June 1961). "Ekanite, a New Metamict Mineral from Ceylon". Nature. 190 (4780). Nature: 997. doi:10.1038/190997a0...

submitted to intense alpha-particles internal bombardment and becomes amorph (metamict state). The loss of mechanical properties of heavily neutron-irradiated...

properties Isotropic Refractive index n = 2.06 – 2.24 Other characteristics Metamict – originally crystalline, now amorphous due to radiation damage. Radioactive...

Moderate; pale yellow-brown parallel to and medium brown perpendicular to long axis Alters to Metamict Other characteristics Radioactive 72.63% (U) References...

uranium decay is believed to be the origin of the predominantly amorphous metamict structure of tranquillityite. Its crystals were obtained by annealing the...

T.; Della Ventura, G.; Oberti, R.; Caprilli, E. (December 2004). "Non-metamict betafite from Le Carcarelle (Vico volcanic complex, Italy): occurrence...

translucent Specific gravity 4.52 Density 5.19 Optical properties Isotropic when metamict Refractive index 2.26 Other characteristics Radioactive References...

Z = 4 Identification Color Black, reddish brown Crystal habit Crystalline, metamict, pseudocubic Cleavage None Fracture Brittle Luster Resinous Streak Brownish...

cell swelling due to the metamictization. Cleusonite crystals are usually metamict black semimetallic prismatic and associated with quartz. It was found at...

aggregates. This amorphization process is also called metamictization. Metamict quartz with its disordered lattice structure is prone to alkali–silica...

James R. O'Neil, Leon T. Silver. "Uranium and Lead Isotopic Stability in a Metamict Zircon under Experimental Hydrothermal Conditions, Science, New Series...

mass 346.61 gm Color Dark to pale brown, brownish black Crystal habit Metamict Fracture Conchoidal Tenacity Brittle Mohs scale hardness 5 – 6 Luster Adamantine...

C. (1999). "Effects of dose rate and temperature on the crystalline–to–metamict transformation in the ABO4 orthosilicates". Canadian Mineralogist. 37:...

Diaphaneity Opaque Specific gravity 4.41 Optical properties Uniaxial Other characteristics metamict due to trace to minor uranium substitution References...

Ireland native at this time living in the United States Roald Hoffmann, The Metamict State Paul Hoover, The Figures Salma Khadra Jayyusi, editor, Modern Arabic...

caused by the subsolidus increase in volume of allanite as a result of metamict alteration due to radioactive decay. While apatite inclusions are common...