Accuracy and indication of data
Standard unit (SI) is used principally for indication, but the density represents in g/cm³ (=10³kg/cm³).

1. Magnetic susceptibility; the data contain measurement error of 1% in accuracy.
2. Natural remanent magnetization (NRM); supposed that the standard deviation (1σ) of total vector of NRM is 50%, based on number of spins and stackings of this measurement, the noise level (detection limit) of the spinner magnetometer ”Model SMD- 88“ shows an order of 2~3x10^-4 T per unit volume.
3. Density; the data contain measurement error of 0.00n g/cm³ (n= ~2, calculation by the accuracy of a balance). The reproducibility after the long period (about 10 years) shows completely the same order. So the data can be rounded off to two decimal places.