The phrase "a rather unstable" is correct and usable in written English.
It can be used to describe something that is not firmly established or is prone to change or fluctuation.
Example: "The economy is currently in a rather unstable condition, leading to uncertainty for investors."
Alternatives: "somewhat volatile" or "fairly precarious".
Gender is a rather unstable concept in Indian art.
It can reversibly be oxidized to yield a rather unstable dimer.
The girl inside the letter proves a rather unstable arrangement and eventually the whole number is canned.
The most stable oxidation state of livermorium should thus be +2, with a rather unstable +4 state.
Without NaCl DB remained in solution in a rather unstable manner, disappearing from the supernatants and pelleting upon centrifugation (Fig. 2A, left panel, four rightside lanes).
In our analyses, this meant that the lower bound comprised information of a substantially smaller number of studies than the higher bound, thus presenting a rather unstable measure.
Due to geological structure, landform and complex submarine dynamic conditions, Baiyun Depression in NSCS has well developed landslide mass, sliding sand slope, large erosion gullies, submarine scarps and other unstable landforms; it is an area with rather unstable submarine engineering geological conditions in NSCS.
However, this can be seen as an 'accidental' and rather unstable configuration since even small changes in viewpoint would lead to vanishing of such occlusion-based junctions.
Smalt, being a potash glass, is rather unstable; in most cases it has degraded and lost its colour, except where it has sometimes been protected by having been mixed with lead white [42].
For instance, native soybeans make an easily oxidized and rather unstable oil.
While scholars such as William Cronon argue that the categories "urban" and "rural"—or relatedly "center" and "periphery"—are not two poles, but rather unstable ends of a continuum, the urban/rural dichotomy seems to have immense discursive and myth-making powers with very real consequences.
