Jean Grey's 70's Phoenix and Dark Phoenix stories

In Uncanny X-Men #100, Jean must fly the shuttle through a solar flare.  She is the only one who can absorb the flight knowledge telepathically and protect herself with a telekinetic shield.  She psi-blasts Cyclops so he cannot stop her.

In Uncanny X-Men #101, Jean's shields have failed and the shuttle crashes into the bay.  However, Jean has been reborn and rises from the bay as the Phoenix.

In Uncanny X-Men #102, Jean tells Misty Knight that she brought herself back to life on the shuttle.

In Uncanny X-Men #105, Jean Grey uses her powers as Phoenix to fight Firelord, a herald of Galactus.  She also powers a Star-Gate.  This issue is the first time Jean manifests the Phoenix effect in the original story.

In Uncanny X-Men #107, Jean is a bit tired after powering the StarGate.  She uses her telepathy to learn that Corsair is Scott's father.

In X-Men #109, Jean uses her telekinesis to hurl an asteroid at the guardian of the crystal.  Jean senses a connection to the M'Kraan Crystal and the white city and energy sphere containing a neutron galaxy that are contained within the crystal.  Jean uses her powers as Phoenix to repair the energy lattice of the sphere containing the neutron galaxy.  

In Uncanny X-Men #109, Jean comes out to her parents as the Phoenix.

In Uncanny X-Men #110, Jean struggles with what she has become.

In Uncanny X-Men #111, Jean and other other X-Men are mind controlled by Mesmero to join a circus freakshow. 

In Uncanny X-Men #112, Jean fights Magneto, but her power falters.

In Uncanny X-Men #113,  Jean fights Magneto again and is able to push him back.  Later, Jean uses her telekinetic powers as Phoenix to save her and Beast from the molten lava. 

In Uncanny X-Men #114, Jean tries in vain to save the other X-Men.  She tells Xavier that the other X-Men are believed to be dead.

In Uncanny X-Men #117, Jean leaves the X-Mansion and goes on vacation.

In Uncanny X-Men #119, Jean arrives in Scotland.  She reveals that since she has become Phoenix, the heat and cold barely effect her. 

In Uncanny X-Men #122, Jean goes shopping and encounters Mastermind as Jason Wyngard. 

In Uncanny X-Men #125, Moira runs tests on Jean.  We are given the original explanation for Jean's transformation into Phoenix.  The radiation tore through the psychic barriers in Jean's mind allowing her to achieve her full potential as a psionic.  She briefly became a being of pure thought and then reformed herself as Phoenix.  Xavier and Moira knew Jean had this kind of potential. This issue shows how Mastermind has been manipulating Jean.  We also see Jean transmute her clothes with her telekinesis.

 In Uncanny X-Men #126, Jean reunites with Scott.  They investigate Proteus while Mastermind continues to manipulate Jean.

In Uncanny X-Men #127, Scott tests the X-Men and they continue to search for Proteus.

In Uncanny X-Men #128, Jean and the X-Men continue to fight Proteus.

In Uncanny X-Men #129, Mastermind continues to manipulate Jean. Scott and Jean share an intimate moment.

In Uncanny X-Men #130, Jean and Scott fight some Hellfire Club guards.  They also encounter Dazzler.  Mastermind continues to manipulate Jean's mind.  We see the beginnings of the Black Queen.

In Uncanny X-Men #131, Jean protects Kitty by smashing some Hellfire Guards in their car.  Later, she challenges Emma Frost to a psychic fight.  Finally, she changes Kitty's father's mind so he will allow Kitty to join Xavier's school.

In X-Men #132, Scott continues to worry about Jean.  Scott and Jean make love on a butte and Jean holds back his optic blast with her telekinesis.  Mastermind manipulates Jean into becoming the Black Queen.

In Uncanny X-Men #133, Jean has turned against the X-Men as the Black Queen.  Cyclops tries to dual Mastermind on the psychic plane for Jean.

In Uncanny X-Men #134, Jean turns against Mastermind, but it is too late for his corruption of her has turned her into the Dark Phoenix.

In Uncanny X-Men #135, Jean turns against the X-Men as the Dark Phoenix.   She also flies into space and consumes a star, destroying the D'Bari homeworld and its inhabitants.  Additionally, Jean destroys a Shiar ship.  Xavier says that Phoenix is the expression of Jean's full potential as a psi.

In Uncanny X-Men #136, Jean visits her family.  Her parents and sister are afraid of what she has become. She is confronted by the X-Men, but she defeats them.  Scott appeals to her humanity. Xavier attacks Jean in an epic psychic battle.  Xavier explains that the psychic barriers he placed in her mind helped to create Phoenix because she gained too much power too soon on the shuttle.  In the end, Phoenix is suppressed, but they are suddenly teleported away.

Uncanny X-Men #137 introduces the idea that the Phoenix is a separate cosmic force.  The Watcher reveals that Jean had become one with a force of primal passion in the universe.  Later, Jean says that the force became her life-force while she became a human vessel for its power.  They are symbiotes and as long as Jean lives, the Phoenix will manifest through her.  The X-Men battle the Shiar to save Jean's life.  However, in the end they must battle Jean as well.   Ultimately, Jean decides to end her own live to save everyone from the Dark Phoenix.

In Uncanny X-Men #138, the X-Men attend Jean's funeral and Scott reflects on her life.  Lilandra gives John Grey a Holo-Empathic Crystal with Jean's essence in it.