...C. A. Francis; P. H. Ribbe Abstract The crystal structure of type manganhumite from the Brattfors mine, Nordmark, Sweden [(Mn 0.68 Mg 0.30 Fe 0.01 Ca 0.01 ) 7 (SiO 4 ) 3 (OH) 2 , Pbnm, a = 4.815(1), b = 10.580(2), с = 21.448(5)A] has been refined by conventional least-squares methods to R = 0.051...

...G. A. Winter; Eric J. Essene; Donald R. Peacor Abstract Alleghanyite, manganhumite and sonolite have been found in the Bald Knob manganese deposit of North Carolina. These minerals are the manganese analogues of chondrodite, humite and clinohumite respectively. They are close to end-member Mn...

...Pete J. Dunn Abstract The manganese humites, (alleghanyite, manganhumite, and sonolite), together with some Mn-bearing samples of the Mg-humites, and the related phases leucophoenicite and jerrygibbsite, from the orebodies at Franklin and Sterling Hill, New Jersey, are described together...

... and parageneses in both localities are distinct: minute isometric grains up to 15 μm in size, associated with friedelite, jacobsite, pennantite, manganhumite series minerals (alleghanyite, sonolite), sarkinite, tilasite, and retzian-(La) are typically embedded into calcite-rhodochrosite veinlets (Ushkatyn-III...

... and coarser-grained in skarn where it coexists with kutnahorite, tephroite, fluorian manganhumite, spessartine, jacobsite, and manganoan magnetite. A-sites in kinoshitalite in skarn are about 3/4 occupied by Ba (with the remainder mostly K), whereas in marble, Ba occupancy of A-sites exceeds 90% and most...

... to periodic mixed layering of leucophoenicite and manganhumite. Leucophoenicite and Mn-humite family members are characterized by an absence of F and significant F contents, respectively. Copyright © 1986 by the Mineralogical Society of America 1986 ...

... manganhumite (and the same stoichiometry as chegemite) but the structures are different and, therefore, leucophoenicite ( e.g ., Welch et al. , 2002 ) and manganhumite ( e.g ., Francis & Ribbe, 1978 ) are considered to be dimorphs. This paper presents a description of the new mineral chegemite...

...-pyroxenoids and spessartine ( Simmons et al. 1981 ; Winter et al. 1981 ; Flohr 1992 ). All Bald Knob spinels for which analyses have been reported occur in rocks containing manganhumite or alleghanyite and lacking Mn-pyroxenoids and (with a single exception) spessartine ( Essene and Peacor 1983...

... / a HUMITE (Mg,Fe) 7 o Si 3 t [O 12 (F,OH) 2 ] h Pbnm MANGANHUMITE (Mn,Mg) 7 o Si 3 t [O 12 (OH) 2 ] h Pbnm CLINOHUMITE (Mg,Fe) 9 o Si 4 t [O 16 (F,OH) 2 ] h P 2 1 / b SONOLITE Mg 9 o Si 4 t [O 16 (OH,F) 2 ] h P 2 1 / a LEUCOPHOENICITE Mn 7 o Si 3 t [O 12 (OH) 2 ] h P 2 1...