PDF versionjeffreyite (jef'-frey-ite). A colorless orthorhombic mineral related to the melilite group: (Ca,Na)2(Be,Al)Si2(O,OH)7 .
PDF versionjeffreyite
PDF versionPDF versionPDF versionPDF versionjeffreyite (jef'-frey-ite). A colorless orthorhombic mineral related to the melilite group: (Ca,Na)2(Be,Al)Si2(O,OH)7 .