These teachings separated them from some within the Millerite movement. Smith admitted having simply followed Millerite and earlier interpreters on this point. The mineral known as millerite is named after him. Many nickel sulfides are known, including the mineral millerite, which also has the formula NiS. Only Joseph Bates had had any prominence in the Millerite movement. Periodical literature played an important part in the rapid and widespread dissemination of Millerite beliefs. These groups, stemming from a common Millerite ancestor, became known collectively as the Adventist movement. She received a vision soon after the Millerite Great Disappointment. Out of the Millerite movement grew the Seventh-day Adventist Church. Coal, brick clay, and millerite ore were once mined in the city. At that time, Truth began attending Millerite Adventist camp meetings. However, "Seeking a Sanctuary" sees it more as an offshoot of the Millerite movement. In 1840, at age 12, her family became involved with the Millerite movement. She experienced her first vision soon after the Millerite Great Disappointment of 1844. It is out of this third Millerite group that the Seventh-day Adventist Church arose.