• Meta-alunogen Mineral Data

    webmineral.com/data/Meta-alunogen.shtml General Meta-alunogen Information : Chemical Formula: Al4(SO4)6•27(H2O) Composition: Molecular Weight = 1,170.72 gm Aluminum 9.22 % Al 17.42 % Al 2 O 3: Hydrogen 4.65 % H 41.55 % H 2 O: Sulfur 16.43 % S 41.03 % SO 3: Oxygen 69.70 % O: 100.00 % 100.00 % = TOTAL OXIDE
  • Meta-alunogen: Mineral information, data and localities.

    zh.mindat.org/min-2660.html The lower hydrate counterpart of alunogen. Compare also Unnamed (Al Sulphate-Hydrate), 'UM1987-13-SO:AlH' and 'UM1976-22-SO:AlFeH'.
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  • (PDF) Temperature- and moisture-dependent studies on ...

    www.researchgate.net/.../308339448_Temperature-_and_moisture-dependent_studie... Furthermore, meta-alunogen can be also obtained from alunogen at room temperature when stored at relative humidities (RH) lower than 20 %. The transformation is reversible, however, water sorption ...
  • Meta-alunogen Al4(SO4 6 2O - Handbook of Mineralogy

    www.handbookofmineralogy.org/pdfs/metaalunogen.pdf Meta-alunogen Al4(SO4)6•27H2O c 2001-2005 Mineral Data Publishing, version 1 Crystal Data: Orthorhombic (synthetic). Point Group: n.d. Typically in fibrous tangled masses and efflorescences, or crackled massive, altered from alunogen.
  • Temperature- and moisture-dependent studies on alunogen ...

    link.springer.com/article/10.1007/s00269-016-0840-7 Furthermore, meta-alunogen can be also obtained from alunogen at room temperature when stored at relative humidities (RH) lower than 20 %. The transformation is reversible, however, water sorption of meta-alunogen to alunogen and the corresponding desorption reaction show considerable hysteresis.
  • CiteSeerX — The nature and significance of sulphate-rich ...

    citeseerx.ist.psu.edu/viewdoc/summary CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Alunogen and meta-alunogen are the dominant phases present in transient sulphate fflorescences that are the latest products of the alteration of ignimbrite country rocks in the long-lived Te Kopia geothermal field. Meta-alunogen pseudomorphs alunogen and both species occur as white, fibrous, tangled masses, as ...
  • Experimental leaching of atacamite, chrysocolla and ...

    www.sciencedirect.com/science/article/abs/pii/S0304386X05000927 The X-ray diffraction patterns of smectite, illite and kaolinite in the residues demonstrate the diminution or complete loss of basal crystal faces accompanied by the neo-formation of alunogen, meta-alunogen, coquimbite and goldichite. These new phases contribute to a temporary reduction of permeability.
  • Dehydration Behavior of Aluminum Sulfate Hydrates

    www.researchgate.net/.../230470026_Dehydration_Behavior_of_Aluminum_Sulfate_H... Furthermore, meta-alunogen can be also obtained from alunogen at room temperature when stored at relative humidities (RH) lower than 20 %. The transformation is reversible, however, water sorption ...
  • Database of Raman spectroscopy, X-ray diffraction and ...

    rruff.info/index.php/r=lookup_minerals/letter=m/.../id_field= a b c d e f g h i j k l m n o p q r s t u v w x y z Bold - RRUFF samples.BoldItalic - other samples.Italic - pending samples.: m Macaulayite: Manganbelyankinite ...