Hagendorfite is a rare mineral that was discovered in Bavaria, Germany. It is made up of iron, phosphorus, oxygen, and hydrogen. Although there are no commonly used synonyms for this mineral, it can be referred to as an iron phosphide hydroxide. Another possible term for hagendorfite could be a hydroxyl-iron-phosphate. This mineral is found in small quantities and typically occurs in granite pegmatites. Its unique chemical composition makes it of interest to scientists and mineral collectors alike. Since hagendorfite is a rare mineral, there is limited knowledge regarding its properties and uses.