Montezuma prasiolite: gamma radiation effects
Creators
- 1. Universidade de Sao Paulo (IGc/USP), SP (Brazil). Inst. de GeoCiencias
- 2. Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)
Description
The amethyst mine of Montezuma, Minas Gerais, is the only one on earth which produces, after heat and irradiation treatment, a quartz of a blue to violetish blue body color, the so-called 'safirita' or blueberry in the trade. Beside this , it is possible by heat treatment to produce two types of prasiolite, 'type 1' and 'type 2' differing in its green color. Prasiolite 1 is a quartz with a yellowish green, prasiolite 2 with a bluish green color. Here are given details about irradiation and heating procedures of heated amethyst from Montezuma to show the changes in color after each step. This allows to select the best conditions for the production of the ideal quality of 'safirita' or blueberry and prasiolite 2. Finally it can be concluded that the irradiation of material from Montezuma always produces an increase in grayish black tons and heating always leads to lighter tons in the colors. It is possible that there exists two processes on atomic scale with opposite reactions. (author)
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42105234.pdf
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Additional details
Publishing Information
- Imprint Pagination
- 8 p.
- Report number
- INIS-BR--10206
Conference
- Title
- International nuclear atlantic conference. Nuclear energy: new jobs for a better life; 17. ENFIR: Meeting on nuclear reactor physics and thermal hydraulics; 10. ENAN: Meeting on nuclear applications; 2. ENIN: Meeting on nuclear industry
- Acronym
- INAC 2011
- Dates
- 24-28 Oct 2011
- Place
- Belo Horizonte, MG (Brazil)
INIS
- Country of Publication
- Brazil
- Country of Input or Organization
- Brazil
- INIS RN
- 42105234
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Resource subtype / Literary indicator
- Conference
- Quality check status
- Yes
- Descriptors DEI
- BODY; BODY COMPOSITION; GAMMA RADIATION; GAMMA SOURCES; QUANTITATIVE CHEMICAL ANALYSIS; QUARTZ; SILICATE MINERALS;
- Descriptors DEC
- CHEMICAL ANALYSIS; ELECTROMAGNETIC RADIATION; IONIZING RADIATIONS; MINERALS; OXIDE MINERALS; RADIATION SOURCES; RADIATIONS;