| Name |
|
Melilite |
| Chemistry |
|
(Ca,Na)2(Mg,Al,Fe)[(Al,Si)2O7] |
| Hardness |
|
5 - 5.5 |
| Lustre |
|
vitreous - greasy |
| Colour |
|
white, yellowish white, brown, grey, greenish
grey |
| Streak |
|
white |
| Density [g/cm3] |
|
2.9 - 3.0 |
| Crystal habit |
|
tetragonal, crystals short,
prismatic or tabular |
| Cleavage, Fracture |
|
[001] distinct, [100] indistinct |
| other characteristics
and occurrences |
|
in igneous rocks poor in
silica and alkali |
 |
|
|