psilomelane การใช้

• Psilomelane consists of hydrous manganese oxide with variable amounts of barium and potassium.
• As an ore of manganese it is much less abundant than pyrolusite or psilomelane.
• "' Psilomelane "'is a group name for hard black manganese oxides including hollandite and romanechite.
• High quality samples have been found in South Africa and Namibia where it is associated with other manganese oxides, pyrolusite and psilomelane and the iron-manganese mineral bixbyite.
• Psilomelane is erroneously, and uncommonly, known as "'black hematite "', despite not being related to true hematite, which is an iron oxide.
• In 1942 the name " cryptomelane " was proposed as part of an effort to sort out the manganese oxide minerals referred to as " psilomelane ".
• It occurs in mixtures with " psilomelane " ( recently renamed to romanechite ) and with other manganese oxides in an iron oxide deposit, most likely bacterially altered from a previous mineral in the Akhtensk deposit.
• The Greek for hidden and black, in reference to the confusion and difficulty in recognition of the various black manganese oxide minerals referred to as " psilomelane ", the collective term for hard manganese oxides.
• We have a page on it-see Psilomelane also check the links or do an image search for'psilomelan'as it can take different forms which don't all look exactly the same . 83.100.249.228 20 : 37, 1 September 2007 ( UTC)