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. Author manuscript; available in PMC: 2020 Apr 3.
Published in final edited form as: Geochim Cosmochim Acta. 2019 Jun 22;260:133–160. doi: 10.1016/j.gca.2019.06.023

Table 1.

Plagioclase EPMA data from chondrules and standards analyzed in the same session

Q7 ±(a) Q13 ± Q15 ± Q16 ± Q19 ± Q35 ± An78 std as unk ± An78 std value(e)
wt. %
SiO2 46.36 0.74,0.72 47.28 1.32,1.80 47.03 0.85,1.08 46.90 2.24,1.16 49.99 0.57,0.89 49.11 1.88,1.17 49.16 0.36,0.31 49.00
AI2O3 33.29 0.97,0.86 32.10 1.71,1.20 32.62 0.73,0.57 33.02 0.60,1.70 30.69 0.97,0.88 30.80 1.14,1.45 32.49 0.32,0.41 32.90
FeO 0.39 0.66,0.20 0.23 0.38,0.24 0.59 0.37,0.26 0.52 0.48,0.29 0.33 0.26,0.12 0.55 0.58,0.39 0.40 0.13,0.15 0.37
MgO 0.79 0.09,0.14 0.92 0.26,0.31 0.89 0.23,0.20 0.86 0.09,0.10 0.90 0.11,0.12 1.16 0.19,0.29 0.13 0. 04,0.06 0.12
CaO 19.11 0.52,0.44 18.55 0.51,0.66 18.85 0.47,0.35 18.90 0.54,1.38 17.34 0.34,0.68 18.30 0. 58,1.42 15.51 0. 30,0.29 15.75
Na2O 0.07 0.06,0.05 0.42 0.60,0.31 0.14 0.10,0.08 0.24 0.66,0.22 0.83 0.17,0.11 0.12 0.09,0.05 2.49 0.09,0.09 2.53
total 100.01 0.84,1.20 99.50 1.28,0.80 100.22 0.66,0.62 100.44 0.41,1.07 100.07 0.70,0.89 100.14 0.89,1.01 100.35 0.38,0.58 100.74
n 72 46 27 25 8 37 11
cations(b)
Si 2.137 0.028,0.038 2.185 0.054,0.074 2.165 0.026,0.039 2.152 0.090,0.042 2.283 0.038,0.042 2.251 0.091,0.046 2.242 0.015,0.011 2.228
Al 1.807 0.040,0.035 1.747 0.080,0.070 1.768 0.048,0.048 1.785 0.037,0.096 1.650 0.052,0.038 1.662 0.058,0.075 1.745 0.015,0.015 1.761
Fe2+ 0.015 0.025,0.007 0.009 0.014,0.009 0.022 0.029,0.010 0.020 0.018,0.011 0.013 0.010,0.005 0.021 0.023,0.015 0.015 0.005,0.006 0.014
Mg 0.054 0.006,0.010 0.063 0.019,0.021 0.061 0.015,0.013 0.059 0.006,0.006 0.061 0.007,0.008 0.079 0.013,0.020 0.009 0. 003,0.004 0.008
Ca 0.943 0.024,0.022 0.918 0.027,0.032 0.929 0.026,0.022 0.929 0.028,0.073 0.848 0.011,0.029 0.898 0.026,0.068 0.757 0.013,0.015 0.766
Na 0.007 0.005,0.005 0.037 0.054,0.027 0.012 0.011,0.008 0.021 0.058,0.020 0.074 0.015,0.010 0.011 0.008,0.004 0.220 0.007,0.007 0.223
total 4.963 0.023,0.017 4.960 0.034,0.034 4.957 0.017,0.020 4.966 0.035,0.029 4.928 0.020,0.013 4.923 0.018,0.052 4.996 0.008,0.009 5.001
endmembers(c)
Ca(Fe,Mg)Si3O8 0.056 0.018,0.010 0.068 0.023,0.020 0.067 0.042,0.011 0.063 0.009,0.011 0.066 0.017,0.010 0.086 0.020,0.032 0.013 0.010,0.010 0.011
NaAISi3O8 0.007 0.005,0.005 0.037 0.054,0.027 0.012 0.011,0.008 0.021 0.058,0.020 0.074 0.015,0.010 0.011 0.008,0.004 0.220 0.007,0.007 0.223
CaAl2Si2O8 0.887 0.018,0.019 0.850 0.044,0.034 0.862 0.035,0.027 0.866 0.026,0.074 0.781 0.019,0.029 0.812 0.017,0.052 0.744 0.010,0.007 0.756
(Fe,Mg)Al2Si2O8 0.013 0.021,0.017 0.005 0.011,0.019 0.016 0.017,0.014 0.016 0.006,0.014 0.007 0.001,0.013 0.014 0.010,0.020 0.011 0.010,0.008 0.012
[ ]Si4O8 0.037 0.020,0.030 0.040 0.044,0.032 0.043 0.023,0.019 0.034 0.033,0.032 0.072 0.018,0.014 0.077 0.061,0.018 0.007 0.008,0.006 −0.005
normalized An(d) 0.993 0.006,0.006 0.958 0.031,0.059 0.986 0.009,0.052 0.976 0.022,0.066 0.914 0.009,0.018 0.987 0.007,0.012 0.768 0.006,0.008 0.769
Q36 ± Q38 ± Q44 ± M3 ± M6 ± M23 ± An95 std as unk ± An95 std value(f)
wt. %
SiO2 50.29 1.74,1.00 48.60 0.58,0.66 49.28 1.25,1.25 48.01 0.28,0.36 47.05 1.70,1.12 47.66 0.66,0.81 44.31 0.31,0.42 44.00
Al2O3 30.03 1.10,1.55 31.42 0.60,0.54 31.86 0.61,0.93 32.60 0.20,0.65 32.35 1.07,0.83 31.32 0.97,0.43 35.33 0.42,0.32 36.03
FeO 0.40 0.34,0.16 0.52 0.63,0.31 0.28 0.20,0.10 0.64 0.35,0.29 0.44 0.86,0.32 0.42 0.61,0.20 0.45 0.07,0.10 0.62
MgO 0.90 0.39,0.28 1.08 0.30,0.14 0.89 0.12,0.10 0.56 0.10,0.06 0.90 0.16,0.15 1.01 0.22,0.24 0.06 0.01,0.03 0.02
CaO 16.61 0.74,0.88 18.33 0.40,0.66 17.80 0.63,0.94 16.57 0.30,0.28 18.64 0.65,0.59 18.14 0.65,1.30 19.07 0.16,0.21 19.09
Na2O 1.30 0.79,0.36 0.23 0.24,0.13 0.68 0.43,0.36 2.01 0.09,0.03 0.34 0.26,0.27 1.02 0.81,0.68 0.49 0.12,0.04 0.53
total 99.71 0.76,0.80 100.31 0.85,1.11 100.79 0.15,0.71 100.40 0.29,1.18 99.68 0.84,0.87 99.66 1.15,1.00 99.74 0.49,0.48 100.29
n 30 24 17 7 28 32 6
cations(b)
Si 2.308 0.070,0.042 2.227 0.018,0.030 2.239 0.052,0.044 2.199 0.023,0.014 2.175 0.058,0.034 2.205 0.021,0.039 2.056 0.006,0.012 2.033
Al 1.623 0.045,0.091 1.696 0.033,0.027 1.704 0.041,0.053 1.758 0.013,0.025 1.756 0.052,0.054 1.706 0.052,0.025 1.931 0.014,0.008 1.960
Fe2+ 0.015 0.013,0.006 0.020 0.024,0.012 0.011 0.008,0.004 0.025 0.013,0.011 0.017 0.033,0.012 0.016 0.024,0.008 0.017 0.003,0.004 0.023
Mg 0.061 0.026,0.019 0.074 0.020,0.009 0.060 0.008,0.007 0.038 0.007,0.004 0.062 0.011,0.011 0.070 0.014,0.017 0.004 0.001,0.002 0.001
Ca 0.816 0.037,0.044 0.900 0.020,0.036 0.865 0.031,0.048 0.812 0.014,0.007 0.922 0.030,0.037 0.898 0.033,0.069 0.947 0.007,0.016 0.944
Na 0.116 0.070,0.033 0.020 0.021,0.012 0.060 0.037,0.032 0.178 0.008,0.003 0.030 0.023,0.024 0.091 0.072,0.061 0.044 0.011,0.004 0.047
total 4.939 0.031,0.040 4.936 0.016,0.010 4.939 0.013,0.010 5.011 0.009,0.010 4.962 0.026,0.024 4.987 0.034,0.038 5.000 0.006,0.005 5.010
endmembers(c)
Ca(Fe,Mg)Si3O8 0.070 0.035,0.018 0.078 0.019,0.015 0.057 0.017,0.010 0.043 0.013,0.004 0.069 0.024,0.021 0.088 0.017,0.013 0.013 0.006,0.009 0.006
NaAlSi3O8 0.116 0.070,0.033 0.020 0.021,0.012 0.060 0.037,0.032 0.178 0.008,0.003 0.030 0.023,0.024 0.091 0.072,0.061 0.044 0.011,0.004 0.047
CaAl2Si2O8 0.746 0.024,0.058 0.822 0.019,0.032 0.808 0.024,0.049 0.770 0.007,0.012 0.853 0.028,0.041 0.810 0.037,0.061 0.934 0.008,0.007 0.938
(Fe,Mg)Al2Si2O8 0.007 0.004,0.018 0.016 0.012,0.019 0.014 0.012,0.014 0.020 0.003,0.021 0.010 0.021,0.015 −0.003 0.018,0.019 0.008 0.101,0.007 0.019
[ ]Si4O8 0.061 0.047,0.025 0.064 0.015,0.009 0.061 0.018,0.010 −0.011 0.012,0.001 0.038 0.025,0.024 0.013 0.042,0.026 0.001 0.007,0.003 −0.010
normalized An(d) 0.866 0.034,0.073 0.976 0.011,0.026 0.931 0.035,0.044 0.812 0.002,0.010 0.966 0.027,0.026 0.899 0.069,0.080 0.955 0.004,0.012 0.952
(a):

uncertainties represent the range of measured values;

(b):

normalized to 8 oxygens;

(c):

endmembers are calculated following the methods from Beaty and Albee (1980)

(d):

normalized to reported NaAlSi3O8 and CaAl2Si2O8 endmembers;

(e):

value reported in Gilbert et al. (2003) with corrected SiO2;

(f):

value reported in Jarosewich (1980); K2O (not shown) is 0.07 wt. %

*:

averaged K2O values for the An78 standard are 0.08 wt. %; all other TiO2, Cr2O3, MnO, and K2O data are below detection limits.