Research on the Cause of Splitting of OH Vibration Spectrum in “Heibi”

Fig. 2. (a) shows the partition of “Heibi” and the EPMA test point position, marked in red (photographed under EPMA),(b)—(f) shows the OH vibration Raman spectrum of a test point position in (a)

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Table 1. Chemical composition of HB(Wt/%)

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Table 1. Chemical composition of HB(Wt/%)

样品	Al₂O₃	SiO₂	K₂O	CaO	NiO	Cr₂O₃	Na₂O	MgO	FeO_T	MnO	TiO₂	Total	Mg/(Mg+Fe²⁺)
HB-1	6.14	52.86	0.23	11.86	0.01	12.27	0.45	13.84	0.06	0.10	0.22	98.02	67.2%
HB-2	5.55	53.55	0.20	11.77	0.01	12.28	0.38	14.42	0.05	0.10	0.09	98.40	69.0%
HB-3	5.08	53.86	0.19	11.52	0.02	12.00	0.38	14.67	0.05	0.11	0.07	97.95	70.2%
HB-4	5.67	53.67	0.23	11.72	0.02	12.01	0.40	14.54	0.05	0.11	0.08	98.49	69.8%
HB-5	5.20	53.82	0.21	11.66	0.04	11.90	0.34	14.71	0.05	0.09	0.07	98.07	70.2%

Table 2. Crystal chemical formulas of HB and other samples

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Table 2. Crystal chemical formulas of HB and other samples

样品	晶体化学式(A_0~1B₂C₅T₈O₂₂(OH)₂)
HB-1	(Ca_1.82Na_0.22Mn_0.01)_2.05(Mg_2.93 ${Fe}_{1.44}^{Ⅱ}$ Al_0.57 ${Fe}_{0.07}^{Ⅲ}$ Cr_0.03)_5.03(Si_7.52Al_0.46Ti_0.05)_8.00O₂₂(OH)₂
HB-2	(Ca_1.82Na_0.22Mn_0.01)_2.01(Mg_3.04 ${Fe}_{1.37}^{Ⅱ}$ Al_0.53 ${Fe}_{0.10}^{Ⅲ}$ Cr_0.01)_5.05(Si_7.58Al_0.40Ti_0.02)_8.00O₂₂(OH)₂
HB-3	(Ca_1.76Na_0.24Mn_0.01)_2.01(Mg_3.10 ${Fe}_{1.32}^{Ⅱ}$ Al_0.50 ${Fe}_{0.12}^{Ⅲ}$ Cr_0.01)_5.04(Si_7.64Al_0.35Ti_0.02)_8.00O₂₂(OH)₂
HB-4	(Ca_1.78Na_0.22Mn_0.01)_2.01(Mg_3.06 ${Fe}_{1.33}^{Ⅱ}$ Al_0.55 ${Fe}_{0.10}^{Ⅲ}$ Cr_0.01)_5.05(Si_7.59Al_0.39Ti_0.02)_8.00O₂₂(OH)₂
HB-5	(Ca_1.78Na_0.22Mn_0.01)_2.01(Mg_3.10 ${Fe}_{1.32}^{Ⅱ}$ Al_0.51 ${Fe}_{0.10}^{Ⅲ}$ Cr_0.01)_5.05(Si_7.62Al_0.36Ti_0.02)_8.00O₂₂(OH)₂
C99^[6]	(Ca_0.03Na_0.01)_0.04( ${Fe}_{1.03}^{Ⅱ}$ Mn_0.08Mg_0.62Na_0.05)_1.78(Al_0.02 ${Fe}_{1.70}^{Ⅲ}$ Mg_3.18)_4.90(Si_7.71Al_0.34)_8.05O₂₂(OH_0.87O_1.11)_1.98
Hlq1^[6]	Na_0.04(Mn_0.01Li_1.94Ca_0.06)_2.01(Al_2.03Mn_0.03Mg_2.03 ${Fe}_{0.95}^{Ⅱ}$ )_5.04(Si_7.95Al_0.05)_8.00O₂₂(OH_1.96O_0.04)₂
S5^[10]	(Ca_0.07Na_0.03K_0.01)_0.11( ${Fe}_{1.98}^{Ⅱ}$ Mn_0.02)_2.00Mg_5.00(Al_0.02Si_7.98)_8.00O₂₂(OH)₂
AMNH34856^[11]	Na_0.01(Mg_1.30Mn_0.57Ca_0.09Na_0.04)_2.00(Mg_4.95Fe_0.02Al_0.03)_5.00Si_8.00O₂₂(OH)₂

Table 3. Partial transition metal ion content of HB (μg·g^-1)
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Table 3. Partial transition metal ion content of HB (μg·g^-1)
样品 Cr Ti Mn Co Ni V
HB 420.06 582.23 955.13 34.23 120.24 203.68

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Lu-lu DAI, Ming-xing YANG. Research on the Cause of Splitting of OH Vibration Spectrum in “Heibi”[J]. Spectroscopy and Spectral Analysis, 2021, 41(12): 3864

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