我国3种绿色图章石中白云母的矿物学特征

陈涛; 韩文; 李甜; 皱倩

doi:10.3799/dqkx.2012.106

我国3种绿色图章石中白云母的矿物学特征

doi: 10.3799/dqkx.2012.106

陈涛^{1, 2,},
韩文¹,
李甜¹,
皱倩¹

1.
中国地质大学珠宝学院, 湖北武汉 430074
2.
中国地质大学地质过程与矿产资源国家重点实验室, 湖北武汉 430074

基金项目:

国家自然科学基金 41172050

国家自然科学基金 40702007

中国博士后面上基金 20100480925

详细信息

作者简介:
陈涛(1979-), 女, 博士, 副教授, 主要从事矿物学研究工作.E-mail: summerjewelry@163.com

中图分类号: P575
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- PDF下载量: 5
- 被引次数: 0
出版历程
- 收稿日期: 2012-01-16
- 网络出版日期: 2021-11-10
- 刊出日期: 2012-09-15

Mineralogy Characterization of Muscovite in Three Kinds of Green Sealed Stones from China

CHEN Tao^{1, 2
,},
HAN Wen¹,
LI Tian¹,
Zhou Qian¹

1.
Gemology Institute, China University of Geosciences, Wuhan 430074, China
2.
State Key Laboratory of Geological Process and Mineral Resources, China University of Geosciences, Wuhan 430074, China

摘要

摘要: 对我国浙江青田山炮绿、福建寿山月尾绿以及西安绿3种绿色图章石分别利用X射线衍射、电子探针、环境扫描电镜以及能谱分析对其矿物成分、化学成分、微形貌特征以及颜色成因等方面进行了研究.研究发现, 3种图章石的绿色部分均由具二八面体结构的2M₁型多硅白云母组成, 属于云母型图章石; 它们的次要矿物组成中山炮绿含有白云石、黄铁矿和磷灰石, 月尾绿含有高岭石, 西安绿含有白云石, 次要矿物组成对绿色图章石的产地鉴定具有一定意义.3种白云母的微形貌特征揭示了西安绿中白云母结晶程度高于月尾绿中白云母, 而山炮绿中白云母经历热液蚀变后晶形不完整重结晶程度不高.另外, 白云母八面体层中杂质离子的化学成分分析表明, 月尾绿和西安绿中白云母的绿色是由Fe³⁺和Ti⁴⁺离子形成, 而山炮绿的翠绿颜色主要由白云母中Cr³⁺离子以及Fe³⁺、Ti⁴⁺离子共同作用形成.
- 白云母 /
- 晶体结构 /
- 颜色成因 /
- 图章石 /
- 矿物学
Abstract: Three kinds of seal stones from China, namely, Shan PaoLv (SPL) seal stone in Qingtian, Yue WeiLv (YWL) seal stone in Shoushan and newly found Xi AnLv (XAL) seal stone have been studied by X-ray diffractometer, electronic microprobe analyses, environmental scanning electron microscope, and energy dispersive spectroscopy to obtain their mineral composition, chemical composition, micro-morphology characterization, and cause of color formation. It has been found that the green parts in these three seal stones are dio-octahedral 2M₁ muscovites and they belong to mica-seal stone. As to minor mineral compositions, they are dolomite, pyrite and apatite in SPL; it is kaolinite in YWL, and it is dolomite in XAL, which can provide some information for their respective places of origin. Micro-morphology characterization of the three kinds of muscovites indicate crystallization of muscovite in XAL is better than that in YWL, and the crystal shape of muscovite in SPL is not good because it has undergone hydrothermal alteration. On the other hand, chemical analyses of impurity ions in octahedral sheet have been studied in order to discuss color causing factors of green muscovite which suggests that green color in YWL and XAL are caused by Fe³⁺ and Ti⁴⁺ while green color in SPL is caused by Cr³⁺ in company with Fe³⁺ and Ti⁴⁺.
- muscovite /
- crystal structure /
- color causing /
- seal stone /
- mineralogy

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图 1 3种绿色图章石的X射线粉晶衍射

Fig. 1. X-ray powder diffraction pattern of three different green sealed stones

下载: 全尺寸图片幻灯片

图 2 3种图章石中白云母的形貌像

a.山炮绿中白云母，b.月尾绿中白云母，c.西安绿中白云母

Fig. 2. Morphology of muscovites in three different green sealed stones

下载: 全尺寸图片幻灯片

表 1 3种绿色图章石的主要粉晶衍射数据

Table 1. The main data of X-ray powder diffraction of three different green sealed stones

SPL					YWL					XAL
2θ(°)	d(Å)	I/I₀	Min	hkl	2θ(°)	d(Å)	I/I₀	Min	hkl	2θ(°)	d(Å)	I/I₀	Min	hkl
8.8917	9.9372	93	M	002	8.896 7	9.931 2	100	M	002	8.925 1	9.900 1	99	M	002
17.798 8	4.979 3	38	M	004	12.443 8	7.107 2	14	K	001	17.882 4	4.956 2	52	M	004
19.971 3	4.442 3	18	M	111	17.789 3	4.981 8	25	M	004	19.904 4	4.457 1	12	M	111
20.756 7	4.275 9	8	M	111	19.927 5	4.451 8	12	M	111	20.673 2	4.293 0	5	M	111
21.692 6	4.093 5	7	M	022	22.995 0	3.864 4	4	M	113	21.659 1	4.099 8	5	M	022
22.996 0	3.864 4	16	M	113	23.884 2	3.722 5	5	M	023	22.962 6	3.869 9	10	M	113
23.898 4	3.720 5	19	M	023	24.963 3	3.564 0	8	K	002	23.865 0	3.725 6	12	M	023
25.569 6	3.481 0	19	M	114	25.562 8	3.481 7	5	M	114	25.586 3	3.478 7	17	M	114
26.806 2	3.323 1	71	M	006	26.811 8	3.322 3	60	M	006	26.939 9	3.306 9	100	M	006
27.925 9	3.192 4	20	M	114	27.900 9	3.195 0	7	M	114	27.942 6	3.190 5	21	M	114
29.931 2	2.982 9	22	M	025	29.249 8	3.050 7	6	M	025	29.964 6	2.979 6	25	M	025
30.984 0	2.883 9	100	D	104	29.919 2	2.984 0	5	M	025	31.351 7	2.850 9	17	M	115
31.318 2	2.853 9	18	M	115	31.308 0	2.854 7	7	M	115	32.187 2	2.778 8	14	M	116
32.087 0	2.787 2	14	M	116	35.084 9	2.555 5	10	M	131	34.576 9	2.592 0	7	M	131
33.089 6	2.705 0	16	P	200	35.944 2	2.496 4	6	M	008	35.011 4	2.560 8	17	M	131
34.710 6	2.582 3	10	M	131	36.633 6	2.451 0	3	M	008	36.164 5	2.481 8	8	M	008
35.145 1	2.551 4	21	M	131	37.852 6	2.374 8	2	M	133	37.785 5	2.379 0	4	M	133
35.980 7	2.494 0	21	D	110	40.250 6	2.238 7	3	M	220	42.464 7	2.127 0	7	M	135
37.117 1	2.420 2	10	P	210	42.518 7	2.124 4	3	M	135	45.639 8	1.986	40	M	10(10)
41.177 9	2.190 5	15	D/M	113/042	45.356 3	1.997 8	16	M	00(10)	53.042 9	1.725 1	3	M	139
42.514 8	2.124 6	11	M	135	55.847 6	1.644 8	3	M	139	55.415 9	1.656 7	6	M	20(10)
45.422 6	1.995 1	10	M/D	136/10(10)	61.912 5	1.497 5	5	M	060	55.933 9	1.642 6	10	M	139
50.552 9	1.804 0	16	D	018						60.930 6	1.519 3	5	M	245
51.104 4	1.785 9	14	D	116						1.716 0	1.501 8	5	M	060
55.850 4	1.644 8	10	M	139
56.318 3	1.632 3	14	P	311
60.813 6	1.521 9	7	M	245
61.966 7	1.496 3	10	M	060
Min.矿物成分；M.白云母；D.白云石；P.黄铁矿；K.高岭石.

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表 2 3种绿色图章石中白云母的晶胞参数数据

Table 2. Lattice parameters of muscovites in three different green sealed stones

	晶系		a(Å)	b(Å)	c(Å)	β(°)	V(Å³)
SPL	单斜	晶胞参数	5.169 4	8.988 4	20.053 9	96°2′	926.634 8
SPL	单斜	标准差	0.001 8	0.004 5	0.006 1	2′	0.432 0
YWL	单斜	晶胞参数	5.180 9	8.956 6	20.074 5	96°1′	926.398 9
YWL	单斜	标准差	0.003 9	0.010 6	0.013 1	4′	0.980 9
XAL	单斜	晶胞参数	5.182 2	9.028 2	19.975 3	95°46′	929.849 0
XAL	单斜	标准差	0.002 2	0.004 1	0.003 9	1′	0.427 4

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表 3 3种绿色图章石中主要矿物的化学成分(%)

Table 3. Chemical data of main minerals in three different green sealed stones

Element	SPL-1	SPL-2	SPL-3	SPL-4	YWL-1	YWL-2	YWL-3	XAL-1	XAL-2	XAL-4
Na₂O	0.287	0.282	0.068	-	0.071	0.121	0.108	0.098	0.131	-
K₂O	10.506	10.123	-	-	9.352	9.718	10.115	10.906	10.923	-
Cr₂O₃	0.067	0.027	-	-	-	-	-	-	-	-
MgO	0.324	0.247	0.046	17.943	0.093	0.067	0.086	4.916	5.392	22.047
CaO	0.108	-	56.208	29.418	0.134	0.081	0.030	0.055	0.055	29.634
MnO	-	-	0.130	0.116	-	-	-	-	0.006	0.006
Al₂O₃	36.734	34.607	0.007	0.065	33.677	34.390	35.051	25.159	25.300	0.033
TiO₂	0.222	0.261	0.060	0.078	0.050	0.026	0.034	0.124	0.229	0.019
Fe₂O₃	0.282	0.218	0.054	4.520	1.797	1.663	1.544	0.012	0.028	0.051
SiO₂	48.207	46.506	0.077	0.048	50.508	48.739	47.825	52.520	52.551	0.017
P₂O₅	-	-	42.123	-	-	-	-	-	-	-
Total	96.737	92.271	98.773	52.188	95.682	94.805	94.793	93.790	94.615	51.807
Minerals	白云母	白云母	磷灰石	白云石	白云母	白云母	白云母	白云母	白云母	白云石

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表 4 3种绿色图章石中白云母的化学分子式

Table 4. Chemical formula of muscovites in three different green sealed stones

	SPL-1	SPL-2	YWL-1	YWL-2	YWL-3	XAL-1	XAL-2
Si	3.126	3.159	3.288	3.216	3.167	3.519	3.495
^[Ⅵ]Al	0.874	0.841	0.712	0.784	0.833	0.481	0.505
^[Ⅵ]Al	1.932	1.929	1.872	1.891	1.902	1.506	1.478
Cr³⁺	0.003	0.001	0.000	0.000	0.000	0.000	0.000
Fe³⁺	0.014	0.011	0.088	0.083	0.077	0.001	0.001
Mg	0.031	0.025	0.009	0.007	0.008	0.491	0.535
Ti	0.011	0.013	0.002	0.001	0.002	0.006	0.011
Mn	0.000	0.000	0.000	0.000	0.000	0.000	0.000
K	0.868	0.877	0.776	0.818	0.854	0.932	0.926
Na	0.036	0.037	0.009	0.015	0.014	0.013	0.017
Ca	0.008	0.000	0.009	0.006	0.002	0.004	0.004
Cht	0.874	0.841	0.712	0.784	0.833	0.481	0.505
Cho	0.045	0.072	0.092	0.061	0.039	0.472	0.446
Chi	0.919	0.914	0.804	0.845	0.872	0.952	0.951
vac(o)	1.008	1.020	1.028	1.019	1.011	0.996	0.974
^[Ⅵ]R²⁺/(^[Ⅵ]R²⁺+^[Ⅵ]R³⁺)	0.016	0.013	0.005	0.003	0.004	0.246	0.266
^[Ⅵ]Al/(^[Ⅵ]Al+^[Ⅵ]Fe³⁺)	0.993	0.994	0.955	0.958	0.961	1.000	0.999
Cht.四面体层总电荷；Cho.八面体层总电荷；Chi.层间总电荷；vac(o).八面体空位；^[Ⅵ]R²⁺和^[Ⅵ]R³⁺分别表示八面体中二价阳离子和三价阳离子数.

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表 5 3种绿色图章石中矿物的化学成分(%)

Table 5. Chemical data of minerals in three different green sealed stones

	O	Na	Mg	Al	Si	Ca	Fe	K
Fig 4a-SPL	51.01	0.89	0.98	18.97	21.21	-	-	6.95
Fig 4b-YWL	46.85	-	-	19.18	24.31	-	1.45	8.21
Fig 4c-XAL	42.45	-	4.66	12.96	30.41	-	-	8.99

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