Ask the Chatbot Games & Quizzes History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture ProCon Money Videos
romanechite
Introduction References & Edit History Related Topics
Quick Facts
Britannica AI Icon
Adding us as a Preferred Source tells Google you trust our content, so our articles show up more often in your Google Search, Discover feed, and AI Overviews.
verifiedCite
While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the appropriate style manual or other sources if you have any questions.
Select Citation Style
Feedback
Corrections? Updates? Omissions? Let us know if you have suggestions to improve this article (requires login).
Thank you for your feedback

Our editors will review what you’ve submitted and determine whether to revise the article.

External Websites

romanechite

mineral
Written and fact-checked by
Britannica Editors
Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....
Britannica Editors
History

romanechite, barium and manganese oxide [(Ba, H2O)2(Mn4+, Mn3+)5O10], an important ore mineral of manganese. A secondary mineral formed under surface conditions, it is often a dark gray to black alteration product of manganous carbonate or silicate minerals. It may form large residual deposits and occurs abundantly in lake or swamp bedded deposits and clays; it is also abundant as a replacement in calcareous or dolomitic rocks. It has been found in Germany, France, Belgium, Scotland, Sweden, India, and the United States. For detailed physical properties, see oxide mineral (table).

This article was most recently revised and updated by John P. Rafferty.