JP3426862B2 - Green Chrysoberyl Synthetic Single Crystal - Google Patents
Green Chrysoberyl Synthetic Single CrystalInfo
- Publication number
- JP3426862B2 JP3426862B2 JP20048996A JP20048996A JP3426862B2 JP 3426862 B2 JP3426862 B2 JP 3426862B2 JP 20048996 A JP20048996 A JP 20048996A JP 20048996 A JP20048996 A JP 20048996A JP 3426862 B2 JP3426862 B2 JP 3426862B2
- Authority
- JP
- Japan
- Prior art keywords
- green
- chrysoberyl
- single crystal
- vanadium
- synthetic single
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Crystals, And After-Treatments Of Crystals (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明はクリソベリル合成単
結晶に関し、特に鮮やかな黄緑〜青緑色を呈するグリー
ン・クリソベリル合成単結晶に関する。TECHNICAL FIELD The present invention relates to a chrysoberyl synthetic single crystal, and more particularly to a green chrysoberyl synthetic single crystal exhibiting a vivid yellow-green to blue-green color.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】クリソ
ベリル結晶構造（ＢｅＡｌ2 Ｏ4 ）を有する宝石として
はアレキサンドライトが一般的である。現在、最高級品
として認められているウラル産天然アレキサンドライト
は、自然光下で緑色ないし青緑色を呈し、電灯（タング
ステン）光下で赤色ないし赤紫色を呈し、変色性を示
す。BACKGROUND OF THE INVENTION Alexandrite is common as a gem having a chrysoberyl crystal structure (BeAl 2 O 4 ). At present, natural alexandrite from Ural, which is recognized as the highest grade product, exhibits a green to blue-green color under natural light and a red to reddish purple color under electric light (tungsten) light and exhibits discoloration.
【０００３】このアレキサンドライトを合成的に製造す
ることも試みられている。例えば米国特許第 3,912,521
号明細書によれば、酸化アルミニウム（Ａｌ2 Ｏ3 ）及
び酸化ベリリウム（ＢｅＯ）の主成分にクロム（Ｃｒ）
及び鉄（Ｆｅ）を添加することが提案されている。Attempts have also been made to synthetically produce this alexandrite. For example U.S. Pat.No. 3,912,521
According to the specification, the main components of aluminum oxide (Al 2 O 3 ) and beryllium oxide (BeO) are chromium (Cr).
And the addition of iron (Fe) is proposed.
【０００４】また、本出願人は、特願昭５２−１０５１
１６号において、酸化アルミニウムと酸化ベリリウムを
主成分とし、着色剤としてクロムを０．００００６〜
３．４５重量％添加すると共に、バナジウムを０．００
０７５〜2.95重量％添加するアレキサンドライト合成単
結晶を開示した。本出願人が開示したこのアレキサンド
ライト合成単結晶によれば、ウラル産天然アレキサンド
ライトにその色合い及び変色性が酷似し、極めて商品価
値の高いものとなる。Further, the present applicant has filed Japanese Patent Application No. 52-1051.
No. 16, containing aluminum oxide and beryllium oxide as main components, and chromium as a coloring agent, 0.00006-
Add 3.45% by weight and add vanadium to 0.00
Disclosed is an alexandrite synthetic single crystal added at 075 to 2.95% by weight. According to the synthetic single crystal of alexandrite disclosed by the present applicant, its hue and discoloration property are very similar to those of natural alexandrite from Ural, and it has a very high commercial value.
【０００５】一方、近年、タンザニアで鮮やかな黄緑、
緑、青緑の多色性を呈するクリソベリル単結晶が発見さ
れ、注目を集めている。このタンザニア産のクリソベリ
ル単結晶は、変色性はないものの極めて鮮やかな黄緑、
緑、青緑の多色性を呈することから、近い将来において
人気を博する可能性のある有望な結晶である。On the other hand, in recent years, bright yellow-green in Tanzania,
Chrysoberyl single crystals exhibiting green and blue-green polychromaticity have been discovered and are attracting attention. This Chrysoberyl single crystal from Tanzania has an extremely bright yellow-green color, although it does not discolor,
It is a promising crystal that is likely to become popular in the near future because it exhibits green and blue-green polychromaticity.
【０００６】本発明者等は、このタンザニア産のクリソ
ベリル単結晶と同様な多色性を呈するクリソベリル単結
晶を合成するべく、鋭意研究を重ねた結果、クリソベリ
ル単結晶に特定の着色剤を特定量含有させた場合は、タ
ンザニア産のグリーン・クリソベリル単結晶に酷似した
色調と多色性を再現できることを知見した。The present inventors have conducted intensive studies to synthesize a chrysoberyl single crystal exhibiting the same polychromaticity as this chrysoberyl single crystal produced in Tanzania, and as a result, as a result, a specific amount of a specific coloring agent was added to the chrysoberyl single crystal. It was found that when it is contained, it can reproduce a color tone and polychromaticity very similar to the green chrysoberyl single crystal from Tanzania.
【０００７】[0007]
【課題を解決するための手段】本発明は、このような知
見に基づいて為されたものであり、酸化アルミニウムと
酸化ベリリウムから成るクリソベリル合成単結晶に、着
色剤としてバナジウムが０．０１〜１．５重量％となる
ようにバナジウム酸化物のみを含有させて成ることを特
徴とする。The present invention has been made on the basis of such findings. A chrysoberyl synthetic single crystal composed of aluminum oxide and beryllium oxide contains vanadium in an amount of 0.01 to 1 as a coloring agent. It is characterized in that only vanadium oxide is contained so as to be 0.5% by weight.
【０００８】[0008]
【発明の実施の形態】クリソベリル単結晶は、ＢｅＡｌ
2 Ｏ4 の化学組成を有し、結晶系は斜方晶系で、比重は
３．７１である。BEST MODE FOR CARRYING OUT THE INVENTION Chrysoberyl single crystal is BeAl.
It has a chemical composition of 2 O 4 , the crystal system is orthorhombic and the specific gravity is 3.71.
【０００９】本発明において使用される単結晶製造法
は、それ自体周知の方法でよく、例えば溶融剤を用いて
原料物質を溶融し、過飽和状態から徐冷しながら種結晶
上に単結晶を成長させる所謂フラックス法、或いは溶融
剤を使用しない直接溶融法がある。なお、この直接溶融
法には、チョクラルスキー法（回転引き上げ法）、ブリ
ッジマン法、ベルヌーイ法等がある。The method for producing a single crystal used in the present invention may be a method known per se, for example, a raw material is melted using a melting agent, and a single crystal is grown on a seed crystal while being gradually cooled from a supersaturated state. There is a so-called flux method in which it is used, or a direct melting method without using a melting agent. The direct melting method includes Czochralski method (rotation pulling method), Bridgman method, Bernoulli method and the like.
【００１０】上記単結晶製造法において使用される種結
晶は、天然クリソベリル結晶であっても、合成単結晶の
方位を定めて切断したものであってもよい。The seed crystal used in the above-mentioned method for producing a single crystal may be a natural chrysoberyl crystal or a crystal obtained by cutting a synthetic single crystal with its orientation determined.
【００１１】本発明のクリソベリル合成単結晶の主原料
物質は、酸化アルミニウム（Ａｌ2Ｏ3 ）と酸化ベリリ
ウム（ＢｅＯ）である。クリソベリル単結晶における酸
化アルミニウムと酸化ベリリウムは化学量論的にはモル
比が１：１であるが、この化学量論比から若干ずらして
格子欠陥を意図的に形成し、この格子欠陥部分に着色成
分を配置させてもよい。この場合、酸化アルミニウムと
酸化ベリリルムのモル比は１：０．９〜１：１．０３程
度の範囲で幅を持たせることができる。なお、本発明で
は、変色性を期待しないことから、クロム（Ｃｒ）は添
加しない。The main raw materials of the chrysoberyl synthetic single crystal of the present invention are aluminum oxide (Al 2 O 3 ) and beryllium oxide (BeO). The molar ratio of aluminum oxide to beryllium oxide in the chrysoberyl single crystal is 1: 1 stoichiometrically, but a lattice defect is intentionally formed with a slight deviation from this stoichiometric ratio, and this lattice defect part is colored. The components may be arranged. In this case, the molar ratio of aluminum oxide and beryllium oxide can be varied in the range of about 1: 0.9 to 1: 1.03. In the present invention, chromium (Cr) is not added because discoloration is not expected.
【００１２】着色成分のバナジウムとしては、バナジウ
ム酸化物、例えば五酸化バナジウム（Ｖ2 Ｏ5 ）、三酸
化バナジウム（Ｖ2 Ｏ3 ）、二酸化バナジウム（Ｖ
Ｏ2 ）がいずれも好適に使用される。Examples of vanadium as a coloring component include vanadium oxides such as vanadium pentoxide (V 2 O 5 ), vanadium trioxide (V 2 O 3 ), vanadium dioxide (V).
O 2 ) is preferably used.
【００１３】本発明のグリーン・クリソベリル合成単結
晶においては、タンザニア産グリーン・クリソベリルが
有する鮮やかな黄緑、緑、青緑色を呈するようにするた
めに、単結晶中に０．０１〜１．５重量％、好ましくは
０．０２〜１．００重量％のバナジウムを含有させるこ
とが重要である。In the green chrysoberyl synthetic single crystal of the present invention, in order to exhibit the vivid yellow-green, green and turquoise of the green chrysoberyl from Tanzania, 0.01 to 1.5 is contained in the single crystal. It is important to include vanadium in wt%, preferably 0.02-1.00 wt%.
【００１４】バナジウムの含有量が０．０１重量％未満
の場合、色彩が薄く、鮮やかな黄緑、緑、青緑にならな
い。また、バナジウムの含有量が１．５重量％を超える
場合、結晶育成が困難になる。したがって、鮮やかな黄
緑、緑、青緑を呈する良好な結晶を得るためには、前記
適正範囲内となるように、バナジウムの含有量を考慮し
なければならない。When the content of vanadium is less than 0.01% by weight, the color is thin and vivid yellow green, green and blue green are not obtained. Further, if the vanadium content exceeds 1.5% by weight, crystal growth becomes difficult. Therefore, in order to obtain a good crystal that exhibits vivid yellow-green, green, and blue-green, it is necessary to consider the vanadium content so as to be within the appropriate range.
【００１５】なお、クリソベリル結晶中にバナジウムを
０．０２〜１．００重量％添加するととりわけ鮮やかな
多色性を示すことから、好適である。It is preferable to add 0.02 to 1.00% by weight of vanadium to the chrysoberyl crystal because it exhibits particularly bright polychromaticity.
【００１６】[0016]
【実施例】酸化アルミニウム（Ａｌ2 Ｏ3 ）を８０．３
重量％と酸化ベリリウム（ＢｅＯ）を１９．７重量％秤
量すると共に、五酸化バナジウム（Ｖ2 Ｏ5 ）を表１に
示すよう量に変化させて結晶の育成し、その結晶の中の
バナジウム含有量と育成状態を調べた。結晶の育成は、
単結晶育成装置内に不活性ガスを充満させて成長させ
た。なお、結晶中のバナジウム量は、原子吸光分析法で
測定した。また試料番号１及び８のものは本発明の範囲
外のものである。その結果を表１に示す。[Example] Aluminum oxide (Al 2 O 3 ) was added to 80.3
Wt% and beryllium oxide (BeO) were weighed at 19.7 wt%, and vanadium pentoxide (V 2 O 5 ) was changed to the amounts shown in Table 1 to grow crystals, and the vanadium content in the crystals was increased. The amount and growing condition were investigated. Crystal growth is
The single crystal growth apparatus was filled with an inert gas and grown. The amount of vanadium in the crystal was measured by atomic absorption spectrometry. Samples Nos. 1 and 8 are out of the scope of the present invention. The results are shown in Table 1.
【００１７】[0017]
【表１】 [Table 1]
【００１８】得られた結晶は、比重３．７１、屈折率
１．７３７〜１．７４５であった。表１の試料番号２〜
７のものでは、色は鮮やかに輝く黄緑、緑、青緑の多色
性を示し、かつ非常に透明感の高い、照りのある結晶
で、合成宝石用結晶として市場価値は高いものと認めら
れた。The obtained crystal had a specific gravity of 3.71 and a refractive index of 1.737 to 1.745. Sample number 2 in Table 1
In No. 7, it is recognized as a crystal for synthetic gems with high market value, showing a brightly shining yellow-green, green, and blue-green polychromaticity and a highly transparent crystal. Was given.
【００１９】なお、バナジウムの添加量が０．００７重
量％の場合、緑色が薄く、商品価値が低いものであっ
た。また、バナジウムの添加量が１．５０２重量％の場
合、結晶に微細な亀裂が入り、結晶育成が困難であっ
た。When the amount of vanadium added was 0.007% by weight, the green color was light and the commercial value was low. Further, when the addition amount of vanadium was 1.502% by weight, fine cracks were formed in the crystal, and it was difficult to grow the crystal.
【００２０】[0020]
【発明の効果】以上のように、本発明に係るグリーン・
クリソベリル合成単結晶によれば、酸化アルミニウムと
酸化ベリリウムから成るクリソベリル合成単結晶に、着
色剤としてバナジウムが０．０１〜１．５重量％となる
ようにバナジウム酸化物のみを含有させて成ることか
ら、タンザニア産のグリーン・クリソベリルと酷似し、
黄緑、緑、青緑に鮮やかに輝く多色性を示し、明るく、
透明感の高い、照りのある市場価値の高いグリーン・ク
リソベリル合成単結晶となる。As described above, the green according to the present invention
According to the chrysoberyl synthetic single crystal, the chrysoberyl synthetic single crystal composed of aluminum oxide and beryllium oxide contains vanadium oxide alone so that the vanadium content becomes 0.01 to 1.5% by weight as a colorant. , Closely resembles Tanzania's Green Chrysoberyl,
Multicolored with vivid yellow-green, green, and blue-green, bright,
A highly transparent, shiny and highly marketable green chrysoberyl synthetic single crystal.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭54−38299（ＪＰ，Ａ) 特開 昭60−71598（ＪＰ，Ａ) 特開 昭54−159382（ＪＰ，Ａ) 特開 昭55−62884（ＪＰ，Ａ) 特開 昭58−120597（ＪＰ，Ａ) 特開 昭55−113697（ＪＰ，Ａ) 特開 昭63−260894（ＪＰ，Ａ) 特開 平３−64085（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C30B 1/00 - 35/00 ＣＡ（ＳＴＮ)─────────────────────────────────────────────────── --- Continuation of the front page (56) Reference JP-A-54-38299 (JP, A) JP-A-60-71598 (JP, A) JP-A-54-159382 (JP, A) JP-A-55- 62884 (JP, A) JP 58-120597 (JP, A) JP 55-113697 (JP, A) JP 63-260894 (JP, A) JP 3-64085 (JP, A) (58) Fields surveyed (Int.Cl. 7 , DB name) C30B 1/00-35/00 CA (STN)
Claims (2)
るクリソベリル合成単結晶に、着色剤としてバナジウム
が０．０１〜１．５重量％となるようにバナジウム酸化
物のみを含有させて成るグリーン・クリソベリル合成単
結晶。1. A synthetic single crystal of chrysoberyl composed of aluminum oxide and beryllium oxide, and vanadium as a coloring agent.
Oxidation to vanadium to 0.01 to 1.5% by weight
A green chrysoberyl synthetic single crystal containing only the product .
バナジウムが０．０２〜１．００重量％となるようにバ
ナジウム酸化物のみを含有させたことを特徴とする請求
項１に記載のグリーン・クリソベリル合成単結晶。Wherein in said chrysoberyl synthetic single crystal, bar so that the vanadium is 0.02 to 1.00 wt%
The green chrysoberyl synthetic single crystal according to claim 1, which contains only nadium oxide .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20048996A JP3426862B2 (en) | 1996-07-30 | 1996-07-30 | Green Chrysoberyl Synthetic Single Crystal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20048996A JP3426862B2 (en) | 1996-07-30 | 1996-07-30 | Green Chrysoberyl Synthetic Single Crystal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1045495A JPH1045495A (en) | 1998-02-17 |
| JP3426862B2 true JP3426862B2 (en) | 2003-07-14 |
Family
ID=16425175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20048996A Expired - Fee Related JP3426862B2 (en) | 1996-07-30 | 1996-07-30 | Green Chrysoberyl Synthetic Single Crystal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3426862B2 (en) |
-
1996
- 1996-07-30 JP JP20048996A patent/JP3426862B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1045495A (en) | 1998-02-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20110277680A1 (en) | Artificial corundum crystal | |
| JP2000503968A (en) | Growth of colorless silicon carbide crystals | |
| US3912521A (en) | Synthetic crystal and method of making same | |
| JP3426862B2 (en) | Green Chrysoberyl Synthetic Single Crystal | |
| JP3940581B2 (en) | Star blue sapphire manufacturing method | |
| US7674334B2 (en) | Artificial corundum crystal | |
| JPH1072295A (en) | Chrysoberyl synthetic single crystal | |
| US4240834A (en) | Synthetic single crystal for alexandrite gem | |
| JPS6071598A (en) | Synthetic chrysoberyl cat's-eye single crystal | |
| DE3249380C2 (en) | ||
| Jayaraman | A brief overview of gem materials: Natural and synthetic | |
| RU2613520C1 (en) | Polycrystalline synthetic jewelry material (versions) and method of its production | |
| JP3205970B2 (en) | Diamond synthesis method | |
| RU2019588C1 (en) | Monocrystal jewelry material on the base of gadolinium-gallium garnet | |
| JPS61266397A (en) | Single crystal for ornamental synthetic forsterite | |
| RU2019587C1 (en) | Monocrystal jewelry material on the base of gadolinium-gallium garnet | |
| JP3724509B2 (en) | LiTaO3 single crystal for light and manufacturing method thereof | |
| JPS6125680B1 (en) | ||
| RU2075559C1 (en) | Method of preparing colored beryl crystals | |
| RU2076156C1 (en) | Crystalline material on the basis of stabilized zirconium or hafnium dioxide | |
| JPS63218596A (en) | Lithium tantalate single crystal excellent in light transmittance and production thereof | |
| JPH01320296A (en) | Production of bi12sio20 single crystal | |
| JPH025720B2 (en) | ||
| Johnson et al. | NOTES AND NEWTECHNIQUES | |
| JP3021937B2 (en) | Method for producing cadmium manganese tellurium single crystal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090509 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090509 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100509 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110509 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110509 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120509 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120509 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130509 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140509 Year of fee payment: 11 |
|
| LAPS | Cancellation because of no payment of annual fees |