Rikkiä

Could you clarify what rikkiä refers to? The term could have multiple interpretations in Finnish (and may be a place name, a surname, a linguistic form, or a fictional concept). Providing a precise wiki-style article requires knowing which sense you want. If you specify, I can write a concise, neutral article under 300 words. If you'd like, I can also create a neutral stub for a fictional or hypothetical concept named rikkiä.