The phrase "although not explained" is correct and usable in written English.
It can be used to indicate that something has not been clarified or detailed, often in a context where further explanation is expected or needed.
Example: "The results were promising, although not explained in detail in the report."
Alternatives: "even if not clarified" or "despite lacking explanation".
Although not explained in the figure caption, an experienced (human) computational chemist can nevertheless infer the semantics that these are normal vibrational mode displacement vectors.
In addition, although not explained here, there are connections to other logics, subsumption as a part of special kinds of algebraic logic, finite Boolean algebras and switching circuit theory, and Boolean matrices.
Post-operative deficits in muscle strength are commonly reported, although not explained.
The Obama administration has said it believes it is acting consistently with the resolution, although it has not explained why it thinks so.
He has not ruled out providing at least some amount of retroactive pay, although he has not explained how he would have money left over for the social programs he hopes to expand.
Although it is not explained what technology the ship contains, Kleiner insists that it should be used to aid the Resistance effort, while Eli counters that it is impossible to control and must be destroyed.
The reason for this difference by sex is unknown, although it is not explained by difference in body weight.
The difference between these two associations can be partially explained by the study's finding that even without any difference in temperature there was still an association with a 3.6 SBP drop, although it was not explained why this occurred.
Although studies have not explained clearly how ILK1 actually contributes to the process of pancreatic cancer, it has been shown to participate in several types of tumors and may be associated with several unique molecules (GSK, AKT, PTEN, etc).
