藍らん鉄てっ鉱こうMeanings1nounvivianitemineralogyA mineral name; a hydrated iron phosphate mineral often found in blue or green crystals. Used in geology and mineralogy contexts.藍らん鉄てっ鉱こうは、湿しっ地ちや泥でい炭たん地ちで見みつかることがある。Vivianite can sometimes be found in wetlands and peat bogs.