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Chiara made a plan, with the goal of “solving the social problems of Trento”. In 1947, it took shape as “Fraternity in action". In 1948 she wrote: "We have understood that the world needs to be healed by the Gospel because only the Good News can give back to the world the life it lacks. This is why we live the Word of Life (…).
Pyrite cubic crystals on marl from Navajún, La Rioja, Spain (size: 95 by 78 millimetres [3.7 by 3.1 in], 512 grams [18.1 oz]; main crystal: 31 millimetres [1.2 in] on edge) Pyrite's metallic luster and pale brass-yellow hue give it a superficial resemblance to gold, hence the well-known nickname of fool's gold.
Galena is the main ore of lead, used since ancient times, [6] since lead can be smelted from galena in an ordinary wood fire. [7] Galena typically is found in hydrothermal veins in association with sphalerite , marcasite , chalcopyrite , cerussite , anglesite , dolomite , calcite , quartz , barite , and fluorite .
Hauerite is a sulfide mineral in the pyrite group.It is the mineral form of Manganese(IV) disulfide MnS 2.It forms reddish brown or black octahedral crystals with the pyrite structure and it is usually found associated with the sulfides of other transition metals such as rambergite.
The Jacksonville, Fla., teen was on a mission to raise enough money for 1,000 young black girls in her hometown to see the movie, and one of the most powerful women CEOs — Winfrey — promised ...
Emma McIntyre/Getty Images Dolly Parton must work longer than 9 to 5 to balance her music and impressive charitable efforts. In 2022, Parton was honored with the Carnegie Medal of Philanthropy for ...
Both pyrite and marcasite are chemically iron sulfide, but differ in their crystal structures, giving them different physical properties. Pyrite is more stable and less brittle than marcasite. Marcasite can also react with moisture to form sulfuric acid. These are the reasons why pyrite is used instead of real marcasite in "marcasite" jewellery.
Marcasite reacts more readily than pyrite under conditions of high humidity. The product of this disintegration is iron(II) sulfate and sulfuric acid. The hydrous iron sulfate forms a white powder consisting of the mineral melanterite, FeSO 4 ·7H 2 O. [13] This disintegration of marcasite in mineral collections is known as "pyrite decay".