Alamosite ( Pb₁₂ Si₁₂ O₃₆) is a colorless

silicate mineral Silicate minerals are rock-forming minerals made up of silicate groups. They are the largest and most important class of minerals and make up approximately 90 percent of Earth's crust. In mineralogy, silica (silicon dioxide, ) is usually consid ...

named after the place where it was discovered,

Álamos Álamos () is a town in Álamos Municipality in the Mexican state of Sonora, in northwestern Mexico. Historically an important center of silver mining, the town's economy is now dominated by the tourist sector. Designated a ''pueblo mágico ...

, Sonora,

Mexico Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatema ...

. It is a rare secondary mineral occurring in the oxidized zones of lead-rich deposits. For example, the infobox picture shows its association with black

leadhillite Leadhillite is a lead sulfate carbonate hydroxide mineral, often associated with anglesite. It has the formula Pb4SO4(CO3)2(OH)2. Leadhillite crystallises in the monoclinic system, but develops pseudo-hexagonal forms due to crystal twinning. It ...

References

Inosilicates Monoclinic minerals Minerals in space group 13 {{silicate-mineral-stub