Rare earth silicate single crystal and process for...

Compositions – Inorganic luminescent compositions – Compositions containing halogen; e.g. – halides and oxyhalides

Reexamination Certificate

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C423S326000, C501S086000, C117S013000, C117S014000, C117S926000, C250S36100C

Reexamination Certificate

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10898209

ABSTRACT:
When produced as a single crystal ingot, a rare earth silicate single crystal1can be formed by cutting out from the single crystal ingot. The single crystal1has a crystal face F100whose Miller indices can be determined by X-ray diffraction. The crystal face F100is composed of a plurality of smooth partial region surfaces (for example, the partial region surface f100A and partial region surface f100B), the plurality of partial region surfaces each have an area detectable by X-ray diffraction, and the angles θ formed between the normal vectors of the plurality of partial region surfaces satisfy the following inequality:in-line-formulae description="In-line Formulae" end="lead"?0.1°≦θ≦2.0°.  (1)in-line-formulae description="In-line Formulae" end="tail"?

REFERENCES:
patent: 5667583 (1997-09-01), Kurata et al.
patent: 6302956 (2001-10-01), Alenkov et al.
patent: 03-103398 (1991-04-01), None
patent: 07-187880 (1995-07-01), None
patent: 09110600 (1997-04-01), None
patent: 2004043302 (2004-02-01), None

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