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The earliest known use of the noun tschermakite is in the 1940s. OED's earliest evidence for tschermakite is from 1945, in the writing of A. N. Winchell. tschermakite is formed within English, by derivation.

In the Fe 3+ -Al IV and Ti-Al IV diagrams, the amphibole compositions define a positive correlation, which suggests the simultaneous occurrence of two types of tschermakite substitution (Fe ...

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Tremolite–tschermakite solid solutions have been synthesized between 700 and 850 °C and 200 and 2000 MPa. The starting materials were oxide–hydroxide mixtures and an additional 0.1–1.8 molal CaBr2 solution. The run products were characterized using SEM, HRTEM, EMP, XRD and FTIR. The synthesized Al tremolites formed needles and lath-shaped crystals of up to 300 × …

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Tschermakite is a fairly common but rarely identified mineral. It often occurs in association with massive green Zoisite and Ruby at the Mundarara Mine, Longido, Mt. Kilimanjaro, Kilimanjaro …

918 THE C ana D ian min E ral O gis T in T r ODUCT i O n Tschermakite is a monoclinic calcic amphibole with the C2/m structure and an end-member formula Ca 2Mg 3Al 2Si 6Al 2O 22(OH) 2, although most tscher- makite compositions recorded do not approach this formula. We have a fairly good understanding of long-

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Ferro-tschermakite is defined as a Tschermakite-Group member with Fe 2+ >Mg and Al>Fe 3+ in the C position. Ferro-tschermakite has been redefined in the 2012 Amphibole nomenclature in that: 1) The formula is changed from ☐(Ca 2)(Fe 2+ 3 AlFe 3+)(Al 2 Si 6 O 22)(OH) 2 to ☐(Ca 2)(Fe 2+ 3 Al 2)(Al 2 Si 6 O 22)(OH) 2.

Crystal chemistry of tremolite–tschermakite solid solutions Received: 9 November 2002 /Accepted: 11 November 2002 Abstract Tremolite–tschermakite solid solutions have been synthesized between 700 and 850 C and 200 and 2000 MPa. The starting materials were oxide–hydroxide mixtures and an additional 0.1–1.8 molal CaBr 2 solu-tion.

In hornblende …as follows: hornblende, Ca 2 (Mg 4 Al) (Si 7 Al); tschermakite, Ca 2 (Mg 3 Al 2)(Si 6 Al 2); edenite, NaCa 2 (Mg) 5 (Si 7 Al); pargasite, NaCa 2 (Mg 4 Al)(Si 6 Al 2).Extensive solid solution occurs, and each end-member has iron-rich equivalents; minor elements, including manganese, titanium, chromium, potassium, fluorine, and yttrium, are

Magnesiohornblende, ferrohornblende, tschermakite, and ferrotschermakite are present predominantly in all three sites (Figure 5a). These amphiboles are characterized by low Na + K content in site A.

Ferro-tschermakite A BCa 2 C(Mg 3 Al 2)T(Si 6 Al 2)O 22 W(OH) 2 Crystal Data: Monoclinic. Point Group: 2/m. As bladed to acicular crystals. Twinning: [Simple or multiple twinning ∥ {100}.] Physical Properties: Cleavage: [Perfect on {110}, with intersections at ~56° and ~124°; partings on {100} and {001}.] ...

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Tremolite + tschermakite amphibole + albite could form pargasite amphibole at higher pressures (Bhadra and Bhattacharya 2007). It is also well known that the most relevant phase of amphiboles ...

characterization of ferro-tschermakite, which was ap-proved by the IMA-CNMNC vote 2016–116. The holotype ferro-tschermakite is deposited in the mineral-ogical collections of the Museo di Mineralogia of the Università di Pavia, catalogue number 2016–02. 2. Occurrence Ferro-tschermakite was found in a specimen found in the

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A new garnet-free, hornblende-plagioclase barometer has been formulated based on the reaction tremolite + tschermakite + 2 albite = 2 pargasite + 8 quartz. The intra- and cross-site mixing parameters for hornblende were retrieved exclusively from experimental data in the P - T window 1–15 kbar and 650–950 °C, after screening the available ...

Tremolite–tschermakite solid solutions have been synthesized between 700 and 850 °C and 200 and 2000 MPa. The starting materials were oxide–hydroxide mixtures and an additional 0.1–1.8 ...

Tschermakite is a calcium-magnesium amphibole, formerly considered a variety of green hornblende, it is now recognized as a mineral in its own right. It forms a continuous series with …

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Rhiw, Llŷn, Gwynedd: tschermakite has been identified from gabbroic rocks of the Rhiw Intrusion, where it forms a late stage magmatic mineral (R.E. Bevins, NMW, unpublished data).

The endmember hornblende tschermakite (☐Ca2(Mg3Al2)(Si6Al2)O22(OH)2) is a calcium rich monoclinic amphibole mineral. It is frequently synthesized along with its ternary solid solution …

Tschermakite Ca2[(Mg;Fe2+)3Al2](Si6Al2)O22(OH)2 °c 2001 M i neral D t Publi sh g, v o 1.2 Crystal Data: Monoclinic. Point Group: 2=m: [As prismatic crystals; as reaction rims on other minerals.] Twinning: [Simple or multiple twinning k f100g.] Physical Properties: Cleavage: Perfect on f110g, intersecting at 56± and 124±; partings on f100g ...

The 2012 amphibole nomenclature has redefined the minerals in the tschermakite-group. Alumino-tschermakite has been discredited and the specimens analysed as alumino-tschermakites pre-2012 are now considered tschermakites.

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The 2012 amphibole nomenclature has redefined the minerals in the tschermakite-group. Alumino-tschermakite has been discredited and the specimens analysed as alumino …

All samples used for whole-rock chemical analyses were crushed to powder using a jaw crusher, a disk mill, and a tungsten-carbide shatter box. Whole-rock compositions were determined by using a combination of inductively coupled plasma-optical emission spectroscopy (ICP–OES) for major elements (Thermo Jarrell-Ash ENVIRO II ICP) and ...