Brilliant Light Power <> UDH?

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How can you explain this?

"Unconventional Heat Observation In The Hydrogen/Iron/Sodium system. Pico-Chemistry As Possible Explanation."
iscmns.org/work11/17 Dufour.pdf

It is a Lugano-type experiment using commercially available iron powder and sodium where excess heat is being reported.

There are at least two ways to form metallic hydrides, first, inside a cavity using lattice pressure and the uncertainty principle, second, using an alkali metal catalyst that provides a quantum mechanical template using rydberg blockade functioning outside the cavity as Holmlid explains.

You can tell which formation mechanism is at play by looking at what hydride is being formed. Pure hydrogen results from rydberg blockade; whereas a metallic hydride (lithium hydride) results from bose condensation inside the cavity.

The sodium LENR success you cite must come from the method used by Holmlid where the pure metallic hydrogen is formed outside the cavity.

GameOver speculates:

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Dark matter is also mass that is thought to exist in the Universe, but has not been observed yet for a number of reasons.

If such yet unobserved matter does not exist then no form of dense hydrogen (whether it is the hydrino, Rydberg matter, or else) would commonly exist in the Universe either. As a direct consequence of this, your previous suggestion that stars are largely made of liquid metallic hydrogen would also not hold anymore, since such stars would also have a much larger mass than currently thought. Such currently unaccounted for mass would be a form of dark matter.

There is no requirement that metallic hydrogen must be dark matter. Gravity is now thought to be an emergent variable forced based on the nature of entangled space time.

No undiscovered particle(dark matter) is required to satisfy the anomalous motion of galactic rotation.

If you want to use the real science name of things, I found a new one.

https://en.wikipedia.org/wiki/Wigner%E2%80%93Seitz_cell

The concept of “Rydberg matter” is meant to mean a crystal from highly excited atoms (with the same principal quantum number n).

The formulation of the mechanism responsible for the metastability of the Rydberg matter depends on the electron density distribution in the Rydberg matter which is highly nonuniform: electrons are at the periphery of the Wigner–Seitz cell.

The domain of their residence is separated from the central region by a potential barrier. Therefore, the atomic ground-state wave functions do not overlap with the valence states of the Rydberg matter. Accordingly, the matrix element for the radiative recombination is virtually zero. The recombination proceeds only through the intermediate tunneling transition to the center of the Wigner–Seitz cell; i.e., it is slow, which is necessary for the metastability.