Lesson plan
Macphersonite
Macphersonite, Pb 4 (SO 4 )(CO 3 ) 2 (OH) 2 , is a carbonate mineral that is trimorphous with leadhillite and susannite. Macphersonite is generally white, colorless, or a pale amber in color and has a white streak. It crystallizes in the orthorhombic system with a space group of Pcab. It is fairly soft mineral that has a high specific gravity. Macphersonite is named after Harry Gordon Macpherson, a keeper of minerals at the Royal Scottish Museum. It was discovered and accepted in 1984.
Article summary
Macphersonite, Pb 4 (SO 4 )(CO 3 ) 2 (OH) 2 , is a carbonate mineral that is trimorphous with leadhillite and susannite. Macphersonite is generally white, colorless, or a pale amber in color and has a white streak. It crystallizes in the orthorhombic system with a space group of Pcab. It is fairly soft mineral that has a high specific gravity. Macphersonite is named after Harry Gordon Macpherson, a keeper of minerals at the Royal Scottish Museum. It was discovered and accepted in 1984.
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
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