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 |
|
|
|